I live in Maine and haven't had to research this, but concur that it's best to go to where the best people are and definitely for RC that's not likely to be Maine.
Mainers tend to think of Boston as THE place to go for any kind of complicated medical issues, plus it's a lot closer than NY. (I come from NYC originally, so of course would be more than happy to go there. In fact, my elementary school was right across the street from Memorial Sloan Kettering.)
Ann
Small TA Grade 1, May-06; recur (2 tiny), same, June-08; TURBTs both times. BCG begun July-08, dosage to 1/3rd May-10, completed treatment December-11. All clear since 2008.