Campers do not have "shocks" (per se) and are heavily loaded so they do not tend to bounce from road imperfections. Thus the "general feeling" that trailer tire balancing does not have the payback that balancing the tires on a car or truck will.
Camper tires typically "age out" rather than "mileage out". UV cracking in the sidewalls and tread grooves kill most camper tires. If this is YOU, save your money for another case of beer.
However, if you "mileage out" rather than "age out" (like a snowbird or full timer) tire balancing will increase tire life; decrease camper bouncing and thereby increase frame life due to flex hardening resulting in cracking of welds and members.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW