Have done that, in driveway that is, good time to check AC's, stove, water pump etc,etc. Have even put people up as guests. If you have power from house even better but do use the Gen for AC too. With water running you can check for leaks around toilets, had both leak on mine, one floor flange gasket and steel bands were loose on both of them. Coach sat in dealers lot over the winter.
Check safety alarms, LP detector mine had no 1 amp fuse. Deploy jacks operate slides.
You get what I'am talking about the more you do less likely to have a problem when its time for camping.