The north end can be tricky for a dock. We have 3 sections that span over 30 yards, probably closer to 40 when it’s all said and done. Ours are aluminum, with a scissor lift over the wheels that can raise or lower it. We typically keep ours pretty high to avoid the said waves, but we’ve never had a problem. We have a plastic decking that goes out in 3 footish square sections. I’ve heard of people zip tieing the decking down, but only do it on one end so if the waves are large it’s lifting the decking, not your dock, but the decking stays there, if that makes sense. Where we’re at, think close to Barnacles, it doesn’t really matter how far out the dock goes. The sand has dunes that rise and fall all the way out to the break, but doesn’t really get deeper than 2 feet the whole way out. We just find the “low point” and that’s where the boat lift goes.
The last few years have been very shallow up there. One year we had to get our toon out in July. Another year I helped shove all the neigobr boats off of lifts because it was so shallow at the end of the year. Vertical lift is a must on that end. We found the lift that gets the lowest of all the brands, I believe ours is shoremaster. Having said that, if you have a pontoon, sealegs might be a better option.
We can’t get a truck back to our dock area, so a wheeler or side by side with a heavy winch comes in handy. Our neighbor uses a skid steer to push and pull his. He doesn’t even take his sections apart, basically drives it like a train. We have a steeper section to get to the water, so putting in is a cake, pulling them out without a winch is a 6 man job.
First time lake ownership, putting in docks, etc is a comedy of errors. Mistakes will happen. Just learn from them and enjoy your cabin.