I would to know this too! I have my own Intex River Run tube and just need to know if I can hop in.
There's a ton of park launch points where you can absolutely just hop in (or out). Go Paddling is an excellent source for finding them. Then you can just take an uber back to your car (assuming your tube will deflate, or fit), or use the buddy system and leave a car where you plan to get out. But
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