Biker Girl from Rochester on 5/26/2021 1:57:13 PM:
There aren't many locks after Lockport between Buffalo and Rochester, so you're probably looking at private campgrounds. The Trip Planner shows a few, and I'd recommend calling ahead to check on availability.
The others are right that it's only 3 hours of riding, but there's enjoying the morning before heading out, taking breaks along the way, seeing the sights, stopping to read interpretive signs, having lunch, and checking out attractions along the way. You could easily spend 5 hours a day or more going 30 miles, and that's without doing major stops for attractions.