[Lake Chuck Duck]

Wanted to see everyone's opinion on best practice on attaching bunks on boat trailers.

Is it best to use a nut and bolt, and countersink the wood to conceal the bolt head, then attach the carpet after bolting up?

or

Have carpet already on board and use lag bolts?

or any other ways? What do yall think? This is for an 18ft fiberglass boat, has a rotten 2x4.