Pivoting Trailer Bunks

Another Newbie Question:
I replaced the carpet on the trailer bunks with good quality marine material and removed the boards to do it in my shop. On reinstalling the bunks, I was not sure if the bunks should be loose enough to be able to pivot to fit the boat during take-out or tight. I took the boat out this past Sunday due to end of season at the state park marina and now wonder if I should now tighten the bunk board bolts to keep this existing fit/tilt?
Thanks for the help.

Mine are tight and do not pivot.

Phil Scheetz
FS 4086