I don't know a whole lot about that league as my son wasn't of age to play in it yet. I did find the following list of the other 9 teams in that league.
Hollis/Brookline Cavaliers
Keene
Monadnock
Nashua Chiefs
Nashua Marauders
Nashua Mavericks
Salem Cardinals
Souhegan Valley Pirates
Walpole
There were 4 Senior Babe Ruth Leagues in NH last year. The Seacoast Senior Babe Ruth League had two divisions as they had 10 teams (That put 5 teams in the State tourney w/2 coming from the Seacoast representing each of their divisions, the other leagues just sent their champion). I would assume that the SBRL would now split into two divisions with the addition of Londonderry giving them 10 teams. That would likely put 6 teams into the state tournament. (2 from SBRL 2 from SSBRL and one each from Granite State Babe Ruth League and National Senior babe Ruth League.
Here is a link to the state website showing the 4 leagues and the teams that were a part of them as of 2009.
NH Senior Babe ruth LeagueThere is also a Regional tournament as well. I assume like regular Babe Ruth there is ultimately a World Series too.
hope that helps....lol