Here's another idea

[DQDick]

Saw this on RV travel this morning and will be doing it soon: Buy a length of 3/4" PVC pipe from the hardware store. Visualize the pipe as a rod near the open end of the mattress box (opposite the hinges). Using this pipe as a "prop," you can hold the bed box open easily and safely. But what's to keep your prop from slipping out? A set of closet rod flanges — one installed on the inside lid of the bed box, the other screwed to the floor — will serve to hold both ends of your new prop rod and keep it from slipping out at the wrong time. Best to find a closet rod flange set where both pieces are completely closed, like the photo, rather than the type with the opening to slide the closet rod down into. It's a cheap, quick and easy fix.

[K0LCB]

Sounds like a good idea. I always use the broom

[Mike117]

What photo?

[mlh]

I use a 2X2 but a pipe sounds better.
Lynwood

[bobcat92]

That is a great idea. I like the pipe because it is lite weight.