I don't think balancing is necessary unless you feel vibration. Typical car tires weight 25 lbs and have a circumference of 83". 245/70-19.5 tires weigh 75 lbs and have a circumference of 106". A 2 oz imbalance on a car tire is very noticeable at 60mph but I doubt you could ever feel a 2 oz imbalance a RV tire @ 60mph.
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
The 22.5's on my former DP needed to be balanced. Had a front tire that was out of balance, just about drove me nuts on a trip north. Had both front tires balanced at a truck repair place, all was well on the trip home.