Chula Vista RV park is a lovely park. We've stayed there many times, always enjoying the quiet location, and only a short drive to downtown. Campland on the Bay is a fantastic family resort that we take the grandkids to every year (in the past we took the kids every year). Lots of planned family activities. Games for kids of many ages. Playground, bike paths and water rentals. That said, remember LOTS OF KIDS. If you want a quiet, relaxed atmosphere, this is not the place. Last year our neighbors left in a huff because so many children infringed on their campsite. Gee Whiz, kids take shortcuts. Mission Bay RV park is just across the inlet from Campland. It used to be a membership park (I think) and became a private resort campground. It is fully paved, well kept, and has a small beach on Mission Bay. I believe they have water rentals, but if not, a long walk, short bike ride will bring you to Campland with rentals. WholesaleWarranties.net has had a few charity Rallies there, we've not attended, but I bet you could call the crew there and ask their experiences at the park. (877-683-2878) Really, I'm not advertising for them, I just think they would be a good resource for your question.
Truly, you can't go wrong with any of the three parks.
Happy Trails.