I had occassion to fish a BASS tournament at Thousands Islands Ny some years ago. That is on the St. Lawrence river on the eastern end of Erie. I fished with Jow Thomas one day and we made the run into Lake Erie. The smallmount fishing greatly impressed me. Several years later I was up that way on business with no boat so I hired a guide for 1/2 day.
The fish were deep 40 ft over 65 feet of water. That day I saw on a sonar ( paper graph) pictures of fish like you see in the Lowarance manual. I could see a fish leave the school and come up to feed on a shad pod.
The guide was strictly a live bait fisherman. My suggestion is to talk to several guides and get their feeling on what the fish will be doing when you plan to go. Make sure you party will be comfortable fishing that way.
If you go for both bass and walleye I would use guides that are species specific.
I didn't particularly like drifting minnows for smallmouth although we caught a lot of fish and a big group could do it.
On another occassion my wife and I went to New England for our anniversary. She suprised me with a trip on Lake Champlain. It was a surprise.
There I was on one of the best smallmouth fisheries in the USA with a guide that didn't fish for them. I had no equipment or anything. I think we were trolling for salmon or something. We never did catch one so I don't know for sure.