I have a roller but I like the bunks set up with slicks idea Lee mentioned.
At Sandy Point state park, they have 15 ramps.(MD guys know where I am talking about) I have witnessed the winch cable snap as people were driving out (once it was me and a buddy

with his boat). My buddy had bunks and it did slide some but I assume the weight of the boat coming out of the water kept her on the trailer. Yes the safety chain was hooked but the hook straightened out! That was a close one.
Another time another person pulled theirs out (roller trailer) and never put on the safety chain and the winch must have not been locked. Boat rolled right off the trailer onto the ramp...
If you ever get bored and need some entertainment sitting at the boat ramp and watch the self proclaimed experts...