I'm seeing on the Good Sam trip planner that there are low clearances on I-190 (Robert Moses Parkway) and RV restrictions on same Parkway. Heard there was parking for campers passing through on Goat I...
We've traveled the entire length of the Robert Moses Parkway in our 12' high Class A with no problems. We did move to the left lane for a couple of arched overpasses though.
In addition, if you stay at 4 Mile Creek SP, your vehicle pass is also good at the Niagara Falls SP parking lots.