Werd. Castle island is fun fun...
I'd suggest next week to be Lincoln in the daylight (Daniel, you'd have to lead this cause I'm a little lost in the back roads!) and then mass ave home, since that's a straight shot to beat the sunset!
Fixie sounds like a very good idea, so we can all get together and bond over broken parts and gasoline.
Actually, if it's in two weeks, I might not be able to make it - I'm slated for surgery at the end of next week, so the following week may still be a mess for me!