I use some "Gray Rubber Diamond-Top interlocking squares"
from
COSTCO (about)$10.00 bucks for a package.
They give you about (6) 24"x24" x 1" thick squares. They are easily stored
and let your feet have piece of mind when stepping out of your Trailer.
You can make a big square or a long runner with the six tiles and they stay
together. Use one or all six .... you have options.
The top looks like this gray diamond top:
With a puzzle type interlocking edges: ......
They interlock like this picture below

