There is a NAMBA club that races in Mansfield Hollow (near Williamantic) - NAMBA11.com I am sure if you drop the club guys an e-mail they could put you in touch with some of the CT guys as they only officially race a few times a year but they do run most weekends in the area. (Pics from the last race I went to last year - http://imageevent.com/justaddwata/na...1racect9182010
There are a few gas guys who run on the CT river. I am not sure exactly where but think it may be a little more on the rough side for a rigger.
I am right on the CT/RI border and tend to head to Warwick RI (right at the Airport exit) which would be a haul for you though there are a few nitros and a handful of gassers.