Good advice -- they've clamped down on parking violations in Southie, anyway, lately.
For those who want to take the T to Southie, there are several options: You can get the no. 7 bus at South Station (Red Line and commuter rail). On Saturdays, it leaves South Station at 11:10, 11:35 and noon. The bus stop is on Summer Street, actually behind South Station, just at the Stone & Webster building. Get off at L and Broadway and walk straight (about 6 blocks) to the L Street Bathhouse. You can get the no. 9 (City Point) bus at Copley Square (Green Line). On Saturdays, it leaves Copley at 11:05, 11:25 and 11:43. The stop is at the Boylston side of the main library building. Again, you can get off at L and Broadway. The 9 also stops at Broadway Station. You can get the no. 11 (Bay View) at Broadway Station (Red Line). On Saturdays, it should leave Broadway Station at 11:17, 11:37 and 11:57. (Be sure you get on the bus heading toward the Point and not downtown -- some people get confused.) Get off at L and 8th for the L Street Bathhouse and walk a couple of blocks.
You can get the no. 10 (City Point) at Andrew Station (Red Line). On Saturdays, leaves Andrew at 11:27 and 11:58. The no. 5 also runs through Andrew; Saturdays at 11:21. Get off at L and Broadway and walk.
All of these buses stop on Farragut Road -- which might be a good additional meeting place for those who will take the T??? Actually, I was planning on walking down that way myself (I live near O and 2nd).
As an afterthought -- for those who don't know the area -- the Farragut Road stop is pretty close to Castle Island.