Re: Replacing bunk carpet.
It would not take too long or cost that much to go ahead and and replace the bunks. You can pre-cut them and get them as close to ready to install as you can then do the rest in the parking lot. You can just use a cordless drill to drill the new mounting holes or carefully measure it out and drill the holes at home before you go to the lake. Take your wrenches and any new hardware you might need bolts, washers, etc. and you will be all set to swap the old bunks out in minimum time in the parking lot.
If the bunk wood is still in good shape, then just pull the old carpet off before you put the new stuff on, as you don't want that old carpet that I assume is dry rotting underneath.