We run the bedroom A/C when it is above about 80 in the summer.
If we are boondocking we run the living room unit by day and the bedroom unit by night, since our Honda will only pull one or the other.
We also mounted a fan on the bedroom wall above the front window. The fan really helps move the air in the spring and fall when the bedroom A/C is too much.
The bedroom A/C was a must have when we were shopping for a new camper. I feel it is better to have it and not use it, than to need it and not have it.
2011 Ram Truck 2500, Crew Cab, 6.7L CTD, 4X4, 3.73 Rear