I pretty much concur with what Dogmama said. There is another park closer in but I don't know if takes RV's- Far Horizons on Pantano. There are several cyclists who live or winter there, and it would be very convenient for shopping and cycling (and close to me, too! )

Rincon East would be convenient for a lot of nice rides on the East side of Tucson. Rincon West is good for going south towards Mission San Xavier, and a few rides to the west. The Voyager is 3 or 4 miles south of the Julian Wash bike path, which you can use to get to some other places to ride, but to get anywhere you have to ride up Kolb Road. It had a bike lane (which can have road debris) and traffic is pretty speedy in that section- 50 mph or more- just so you know.

Send me a PM if you need more info.

Sharon