Hog island market has bait I'm pretty sure. Not sure of the hours though. Just take the last left before the bridge to Alburg, and its down there a ways on the right. Martin's in Highate Springs is further north but has bait as well. There is also the place right in Swanton Village that has bait at the 3 corners. Go across the river towards rt. 78 and take a right at the 3 corners, bait shop is right there.