i'm doing the same thing now (a second small "grab and go" pedal board) and i'm thinking about using this new setup from gator since it comes with the board, a case and a power supply all for $100
http://www.musiciansfriend.com/product/Gator-GPT-Powered-Pedal-Bard-with-Carry-Bag?sku=546157
no idea how good it is since it's brand new on the market but i figure it's worth a shot for the low price since it won't be my main board.
oh and i run my main board off a 1 spot...what don't you like about it? i've never had a problem with it.
-Mike