When I was at OH I commuted several times BOS-JFK, but there was no crew lot for us. There is one for DL, but I'd heard that the folks running that lot got wise to OH crews trying to use it....seemed to be hit or miss, I never gave it a shot. As you probably know parking there isn't cheap, pre-flight may be your best option as ERJ mentioned. A lot of times I ended up just driving down to JFK anyway but if I did jumpseat down I would either get a ride or park at Alewife and get the T. Don't miss those days...