Thought I had a photo, but can't find one. I bought a new 68" x 12' Aluma trailer for my lakester, with aluminum arched 6' ramps. I had the dealer weld a pair of "stakes" on one side of each ramp which sit in stake-pockets along each side near the front of the trailer's side rails. A latch pin holds each one in place. Works well.
Edit: I found a picture.