Generally easier to heat than cool. 72 at the peak heat of the day might be tough but will cool quickly as the sun gets lower. Depends on shade etc too. Heating to 67 s/b fine down to 40 outside. The canvas areas might seem a bit drafty as there is not much insulation.
Air conditioning you pretty much need to be plugged in. Furnace will run on battery and propane but the battery will only last one night before you need a recharge. Easy to heat if plugged in but do monitor your propane daily if running the furnace a lot.
My experience is with a POP-UP tent trailer.