Did you insulate the floor too?
Is the Mr. Heater big buddy enough to warm the trailer up while getting gear on? If so, why run the generator and 1500 watt heater? Can figure out why you use one versus the other.
Yes floor is insulated spray foam on exterior.
The Mr Heater is plenty of heat. At night I don't run the Mr. Heater, only the electric. When gearing up after unloading I only run the propane Mr. Heater not the electric until we return from riding.
Even though the propane heater is "indoor safe" and supposed to be no CO2 emissions I don't trust it at night while we sleep. So I run only electric at night. I run the propane (Mr. Heater) after unloading because it has more BTU's and heats up the trailer quicker.
Then when we are riding I use the propane so I can lock up the generator and also to not have the noise of the generator running. Don't need lights during day either when we are riding and all electronics are charged up from being plugged in overnight. If we are at a trail head or somewhere parked that may not actually allow camping. It looks like just a parked trailer no one would know we are sleeping in it at night except when we are actually in it.
The electric heat would probably be enough on its own also but then my generator would only be secured by a chain or cable locked to the truck during the day.
Or it would take some time to come up to temp, after unloading or when getting back from riding if we shut heat down to lock up generator.