We use blocks a lot. If there is any chance of the jack sinking even a little I put the blocks down.
23 years ago I made some 15" x 15" blocks out of 3/4" plywood. I doubled some to be 1.5" thick, others I tripled to be 2.25" thick. None are just 3/4", they're all laminated to some degree.
Yes, I have to manually place them but I drilled a hole in each corner so I could easily drag them out with the awning rod when leaving.
That was 23 years ago and we're still using the same blocks today. For my money that's hard to beat.
Funny side note story too;
2 years ago we went to Watkins Glen for the NASCAR Race. It had rained a bunch before we got there and the ground was extremely soft so out come the blocks.
When we got ready to leave one block had sunk in so deep I unknowingly missed it. This past year we pulled into our spot and there it was, sunk about flush so even the lawn mowers missed it. With not much effort I was able to recover the block and it's back in inventory.
Yeah, plywood holds up fairly well.
There are 24 hours in every day - it all depends on how you choose to use them.
Bruce & Jill Brown
2008 Kountry Star Pusher 3910