Hi Everyone, I thought I would share what I ended up purchasing.  The Roswheel (Sahoo) Essential Series Convertible Bike Trunk Bag/Pannier (https://amzn.to/3jlGY7p) works great under the back seat.  Even though its upside down it works great with some velcro to easily pull it out and put items inside.  On the back seat the Lixada (Sahoo) Insulated Trunk Cooler Bag for Warm or Cold Items, Bicycle Rear Rack Storage Luggage, Reflective Cycling MTB Bike Pannier Bag, 8L (https://amzn.to/3dit1n0) works great as well with some velcro. 

My wife and I purchased 2 RadRunner Plus bikes in Aug 8th and received them Nov 6th.  Our requirements for the bikes was that your back is as straight as possible, has a step through, and can carry our children.  Then it all came down to the cost of the RadRunner vs the Plus and after considering the cost to add the rear seat, display, and the fact that you cannot add the suspension forks later or the gears it made our decision easy to go with the Plus.  I cannot tell you how much of a different the suspension forks help with the ride and my wifes back when going over even the smallest of bumps.  You will be surprised at just how often you are shifting up in gears as otherwise your pedals are spinning too fast in assist levels above 2.  My wife normally rides in assist level 2 and gear 2 and I find myself changing the assist and gears depending on what I am riding over.  These bikes are amazing and I recommend them to anyone!  As to your question about the kickstand and the kids I defiantly would not rely on the kickstand when loading your children.  I always get on the bike first then have our kids get on the back.  Our kids are 12, 10, and 9 and they love riding on the back of both of our bikes!  In your case you have a much younger 2 year old so you probably want to remove the seat for now and get the child seat until they are at least 5 or 6 and can hold onto you or your seat.  The only downside to this bike is the stock seat because after you ride it for 1 hour your bum will start to be sore.  I opened a ticket with Rad and they were so nice to send us a free Seatpost — 390mm × 1 and we then purchased the brown Velo Plush from their website and its great!  It has a built in handle under the seat for the kids to hold on and really helps with the ride.  Granted it won't go all the way flush like the stock seat does but I can always change it out when I want to ride low rider style on the rear seat.   Let me know if you have any other questions :-)  If you do end up buying a bike send me an IM and I can send you my RAD Refer a Friend code in which you will get $50 off your bike and RAD will send me a $50 Amazon gift card and I will then split the Amazon gift card with you and send you a $25 Amazon gift card or use the affiliate link to help support this forum.

Has anyone found a good fabric zipper storage or some sort of storage to utilize all of the space under the rear seat on the RadRunner or RadRunner Plus?  I found this linkhttps://www.thingiverse.com/thing:3968884  in which he has 3D printed his own drawer which looks interesting but I think it could rattle and I would rather look for other options.  I am just looking for something that could attach to the frame under the seat and maybe have a side zipper in which we could keep small supplies for the trip.  Thanks!

Has anyone found a good fabric zipper storage or some sort of storage to utilize all of the space under the rear seat on the RadRunner or RadRunner Plus?  I found this linkhttps://www.thingiverse.com/thing:3968884  in which he has 3D printed his own drawer which looks interesting but I think it could rattle and I would rather look for other options.  I am just looking for something that could attach to the frame under the seat and maybe have a side zipper in which we could keep small supplies for the trip.  Thanks!

My wife and I purchased 2 RadRunner Plus bikes in Aug 8th and received them Nov 6th.  Our requirements for the bikes was that your back is as straight as possible, has a step through, and can carry our children.  Then it all came down to the cost of the RadRunner vs the Plus and after considering the cost to add the rear seat, display, and the fact that you cannot add the suspension forks later or the gears it made our decision easy to go with the Plus.  I cannot tell you how much of a different the suspension forks help with the ride and my wifes back when going over even the smallest of bumps.  You will be surprised at just how often you are shifting up in gears as otherwise your pedals are spinning too fast in assist levels above 2.  My wife normally rides in assist level 2 and gear 2 and I find myself changing the assist and gears depending on what I am riding over.  These bikes are amazing and I recommend them to anyone!  As to your question about the kickstand and the kids I defiantly would not rely on the kickstand when loading your children.  I always get on the bike first then have our kids get on the back.  Our kids are 12, 10, and 9 and they love riding on the back of both of our bikes!  In your case you have a much younger 2 year old so you probably want to remove the seat for now and get the child seat until they are at least 5 or 6 and can hold onto you or your seat.  The only downside to this bike is the stock seat because after you ride it for 1 hour your bum will start to be sore.  I opened a ticket with Rad and they were so nice to send us a free Seatpost — 390mm × 1 and we then purchased the brown Velo Plush from their website and its great!  It has a built in handle under the seat for the kids to hold on and really helps with the ride.  Granted it won't go all the way flush like the stock seat does but I can always change it out when I want to ride low rider style on the rear seat.   Let me know if you have any other questions :-)