We use our table in the slide out all the time when we are traveling. I have 2 lengths of board that run the full length of the slide. I ran them thru the table saw and cut a bevel on one side.
The beveled side gets put under the slide when it's in. That fills the gap and we don't have to worry about breaking it loose from the end walls. When we get to our destination, they get taken out and I set them on top of the axles. They stay dry and clean there.
By the way, welcome to the forum.
Edited by: Old Farmer