We removed ours, as we found the lower bed more comfortable, and we do enough winter camping that we're not going to sleep with the top up anyway.
In place of the rear bed panel (the one that's in the far back), we replaced that with wire mesh and poles on the front and rear of it to keep it in place (imagine replacing the rear bed part with 1/2" hole-sized chicken wire if you will). Then, we put ski boot liners, gloves, hats, socks, and anything else that's wet from a day's skiing up there. Even coats sometimes. This gets all our wet stuff from being draped all over all the chairs, and since heat rises, in the morning everything is dry. Works like a charm.
Better yet, on the way up and down from skiing, the Arctic Shades fit up there nicely, so now we have an out of the way place to store them.
2006 RB50 6.0 Diesel
Flatplate water heater (mounted INSIDE), portable butane stove (no propane)