We were extremely lucky in that we got to accompany our boat on a 7 hour cruise from its home marina to the lift-out marina where we were having its out-of-water survey (and we appreciate this was unusually lucky). This gave plenty of time to test drive and try everything out. Uncovered several issues that the surveyor had initially missed during the in-water survey. Even if you only have a 10 minute test drive you should still try out everything you can (hob, oven, loo, water pump, shower, fridge, sockets, heating etc). About the only thing we didn't do was light the logburner! Do not rely on your surveyor to find everything and try and be there while the survey is taking place.