The weather will likely play a big role. If it was going to be a nicer day then you might run into a reasonable amount of boats/anglers but Saturday looks pretty friggin’ cold out so I don’t think it will be an issue. The over night low on Friday looks to be below freezing and the daytime high won’t even get to 60.
There are four public accesses on the north side. Garrison has two (south and north), wealthwood, and malmo. Wealthwood and Malmo are shallower accesses that can sometimes have a lot of sand buildup. I don’t know how high or low the water is this spring but if you have a big boat, I would use one in Garrison instead. Parking is reasonable at both, but South Garrison has a double ramp and north only has one.