Unless and until you have road tested it with some weight aboard, you won't know the answers. Make sure the tire pressures are correct all way around, then you find some sand bags or cement adding just a whole bunch of them on the floor....cover that with a tarp, eh... You will have a pretty good approximation of your weight going down the road. Then..head for the Interstate..or at least a highway..and ensuring there is nobody close behind or beside, make a few cautious fairly low speed maneuvers. Don't be like trying to do the Grand Prix...and not a full speed assault either. Just start at a conservative speed..make a few wheel moves...does it feel like an elephant about to roll over? And you wanna be passed by a transport, going full-bore..and see what the RV feels like with the wind from it.
If it feels and drives securely, you can assume that your suspension is good to go. If it is all soft and not feeling like this is a good thing...you have to decide what to do.
Gary Haupt