I'm curious on what other folks procedure is with full hookups. We are staying at a campground for 5 nights - I would normally pull in and leave the grey tank open and close a day prior to opening the black tank. I would then empty the black when full and empty the grey and close the black and leave the grey open...repeating the process. I have only questioned this process after camping where another camper didn't have a secure connection which caused a very potent order because their elbow connection wasn't seated properly (it sat in vs screwed in - no fault of the camper) After this episode, I now leave both grey & black closed and empty when required during the stay and fully empty on departure. What do you all do?