Your trucks GVWR and Axle weight ratings are going to be your limiting factor.....leaving you with few choices.
Adding leaf springs, air bags etc will NOT change that.....
You can get MORE trailer if you go bumper pull then via 5th wheel.
5th wheel pin weight is carried by trucks Rear Axle and use a higher pin weight percentage (20%-25% of trailers total weight)
Trailer tongue weight can be 'distributed' across truck and trailer axles using a WDH (10%-15% of trailers total weight)
Many trailers now have high ceilings.
Do you know what your truck weights are 'camp ready'------all passengers, stuff in truck cab, stuff in truck bed etc) ?
Do you know how much add'l weight truck could carry....GVWR minus scaled weight and RAWR minus scaled weight??
Weigh your current truck...then with real numbers you can calculate max numbers your truck could handle w/o being overloaded
Tire Data Sticker (Yellow sticker on door jamb) will have MAX Cargo Carrying Capacity