Done it many times. My daughters love to go out to the backyard and camp. When people buy new campers I tell them it's the best way to get to know your camper is to spend a few days "staying" in it while it is hooked up in the yard. Saves some learning curves when you are actually away from home camping.
Same thing here. We get ice storms in the winter and tornadoes/high winds in the spring that take out the power. We have a 4000 watt generator in the front basement of our 5er. In the winter, I run the furnace (gas) in the house and a few lights/TV/ refrigerators off the RV generator. In the spring and summer, we just move in to the camper and have A/C, TV and the rest. 2 neighbors have generators too, but not the camper, so I don't feel too guilty with power, but the A/C in summer gets me a few comments.We've lived out of our camper in the backyard a few times