Timbrens or Firestone ride rite bags and camper cover?

A good set of shocks should help but I'd have a look at TorkLift StableLoads as a first step. Often times that excessive bouncing you experience is due to coming off the overload springs. The StableLoads will help keep the overloads engaged to avoid that rebound.

Some prefer Timbrens but I'd rather have bags if going that route. I've found the loaded ride to be better with bags.