Button Bay State Park near Vergennes, VT

I just called Button Bay State Park because I’m camping in the area next week. They charge to use their dump station if you’re not camping there. Per their website, $25 for RV’s up to 30 feet, $50 for RV’s and buses over 30 feet. (The guy on the phone only said $25 and didn’t mention RV length.)
5 Button Bay State Park Rd, Vergennes, VT 05491
Call for hours: (802) 475-2377
https://www.vtstateparks.com/parks/button-bay
FYI, I haven’t been there. For $25, I probably won’t go.

Kingston NY

We just used the dump station at Camping world in Coxsackie NY, exit 21B off interstate 87. It was $20 (free if you belong to Good Sam) They supplied the hose to use. The area was in the back in front of bay 19 of the service area.

FYI the Kingston NY location does not have a dump site.