I hear guys have been hookin' into smallies over by Selfridge, and when the water warms they fish in 8 to 10 feet of water for them at the mouth of the little bay there. The weeds have just exploded out there too. Faster than last year, but the warm weather the last 2 weeks of May helped that out a lot.
From New Baltimore, your closest ramp looks like Brandenberg Park on Jefferson. Which is off 29 as you're leaving out of town proper on the west side. There's a Clark station on the southside of the street, and a Sunoco on the north side. It's a 3 way intersection, with a traffic light right there. The other ramp is the DNR ramp in Fair Haven that would be the closest. You need to head east out of town like you're heading to Algonac, and it's just a bit passed Bud's, but that's not the name anymore, it's just what everybody has called it for years. There's a Rachel's Diner on the right, and Downriggers Bar and Grill on the left. If you get to Palms rd, you just missed it. If those are full, continue on passed Palms rd on 29, and go to the road where the last building is on the right. That is Anchor Bay Dr. take a right on the that rd, and follow it all the way back, and stay to the right. There is a DNR launch back there that will open into the mouth of the North Channel into Lake St Clair. Nice thing about Fair Haven launch, is Blue Bait and Tackle is right across the parking lot.
Oh, one last place not too much further down the road from Brandenburg, is a launch by Selfridge. Just stay on Jefferson heading south past the park, and go all the way down to the 4 way intersection before you get to the base, and hang a left. Go to the end of that road, as there's a launch on the right and Angler's Point Marina Bait and Tackle on the left. I think they have cottages there, and wells for those who stay there so you're not launching and retrieving everytime you want to go out. Just an idea is all.
I have fond memories of Algonac. My great grandparents had house on the North Channel about a mile down river from the Harsens Island Ferryboats, at the Middle Channel Junction. Was a great place fro a kid growin' up and spending every holiday week off school there, and most summers, and weekends helping the grandparents and boating and fishing.
Hope this helps!