Help Me Learn Everything on Salmon Fishing off Shore
Casting crankbaits or 3/4 oz cleos/kastmasters/champs is also a good setup. Don't do that in the river, though. Only snaggers do that
Avoid the river during the run. The fish are close to death and the crowds make it not fun.
Some buddies of mine did field work with wardens during the run to help catch snaggers. Their rule was anything hooked in front of the gill plate was ok. Seems hard to believe, but that was their criteria. They still caught plenty of people LOL.
Take that for what its worth. I personally don't fish them in the rivers anymore. I'd stick to the mouth of a river to get fresher fish though. Some people keep them when the meat is turning grey, seems gross to me.
The suggestion of a spawn sack set off of the bottom with a weighted rig is a good place to start. Casting 1/2 or 3/4 oz Cleo's, Kastmaster's (formerly called Mr. Champs), or Krocodiles works great too. I've had my best luck with silver spoons with green pearlescent tape on one face. You can use your walleye gear but if you tie into a big one, you'll have your hands full. The smallest rig that I fish with is a 7' medium action rod with 8 lb test mono. My regular rig is my 8'6" medium heavy musky rod with Power Pro and a 10 lb fluoro leader.
How long ago did that man tell you about salmon fishing? I'd hate to burst your bubble but the bite has been far from plentiful, especially this year. Salmon numbers are down 75% from 2012 in the lake according to an article the I read just this week. The state agencies around Lake Michigan have cut stocking to avoid a total population crash similar to what happened in Lake Huron a few years ago. There just aren't enough alewife for the salmon to eat these days. I fished Kewaunee last week and only saw one fish caught and could count on one hand how many I saw jump or swirl the surface. I can't speak for how the fishing is in Marinette but I can't imagine that it's much different up there. It would still be a fun trip for you since it would all be a new experience but I wouldn't expect to return home with a cooler full. From what I've seen this fall, you'd be lucky to take home one or two. Best of luck if you give it a try.