Once again, I'll put in a good word for General RV, Birch Run, MI. Nowhere, repeat, NOWHERE, on my invoice is anything that relates to a charge for dealer preparation or doing a PDI. They held the rig over the winter for us, added the things we asked them to, and when we did the inspection to take possession, they had it hooked to power and water and spent as long as I wanted going over everything. And the service tech that went through it with me fixed everything we AND he found before I finished signing the final paperwork. Taking it back later in the season for some warranty work and repair, everything was again, spot on. The only delay was to replace the dining table for the damage that he saw before I did. When they had it, we stopped in on our way by, got the new one in and continued on.
A dealer that wants to charge you $900 to see if the plumbing doesn't burst is ripping you off.
I'll get off the soapbox, now.