We've been all over the US and find wood is best. First I won't do a site the requires more that 2 2x6x 10". I carry 2 boards 36" and about 4x6x10s for the stabilizer jacks. Sometime on a hill (front to back can be bad without several of the 4x6 bunch. Remember the less you need to lower your stabilizers the more stable the trailer. I have a box the is aluminum on the back of the trailer it is 12" tall and about 30" long this stores most of the wood along with my chocks. It is handy as the dirt stays outside of the trailer. Works for us as we've been doing this since 1977.