21-
Just got back from a 6-day trip to New England, where we camped every night but the last...that being in CT near the two biggie casinos there. We just stayed in the Super 8 in Groton, which was about 15 minutes from the Mohegan Sun. It was $55 with tax on Sunday night, but did the trick.
I imagine some locals may be able to give you more info, but there were several motels at that exit...right off of I-95.
good luck