well it is in Alaska.... so the permits and stuff are not the issue.

the issue is do I want this type of system in my food supply? or should I build some form of removable wooden rail and trolley system with untreated wood?
I know we have.... a lot of ex researcher's and wdfw types here, as well as many grad's of the fisheries programs at the state schools on the board. as well as many guys who have real world experience here. some have already answered, but what am I looking at for damage to the environment? and I do realize I have limits as the beach is the road for the people on the other side of me. although I am not sure they have a legal easement, I am not going to be the guy to take the bureaucracy to the woods.

wood will rot. and will need to be replaced a lot, rail line If I can find it, will last me the rest of my life. but I don't want to have to travel further for crab because I put this in, I don't want the salmon to not swim by the beach on the way to the creek because I put this in. the beach is rocky with some streams nearby so sediment could be an issue. that may just mean I can't go as far out as I want. because I don't want to mess up the "road". elevated close to shore should not be an issue, putting it in the ground further out where the travel is will be the only hope there. so there are going to be some limitations, to tide cycle. there is a rope/pully system there for low tides. but I didn't want to store the boat out there that much...
so it may be a combination set up rail to point A and rope to the morage buoy, get the boat out only at high tide. that would reduce it's time on a rope to less than a week most of the time as there will be a high tide I can move it in at that is not dark.
anyway I am overthinking it now.....
please feel free to send me thoughts and links. as for boat size I am thinking 22 foot alumaweld with a pair of 75 hp's on the back.... don't need it to go 50 mph but need to be sure it will get me home, but that is a completely different topic.