That's funny -- I just did that yesterday too, as an experiment (pushing up on the board I could reach).
What I notice most is creaking sounds coming from the roof area, when the van body is getting torqued in a corner or during one-wheel-at-a-time
"driveway curb" exits. Is that the pop-top roof itself (Weekender in this case), or the bunk board, or both? If the former, any suggestions how to quiet that down?