I am a long time lurker "coming out of the closet", so to speak. Since I live about five miles south of the Quabbin, I thought I could add to the info you received.

You can launch a canoe only at the Pottapaug Pond section at Gate 43. There is a fee, but I'm not sure what it is. The "Paug" is a relatively shallow area that provides a decent warmwater fishery. Despite what was stated in an earlier post, there are no pike in Quabbin.