If the sausage were $5 each that would leave a pretty good profit to go toward forum fees, for sure. I think it's a no brainer, it's delicious, it's cheap, it helps the club, there's a grill on location and it's classic Oktoberfest-style food AND it's food made with beer and hops - Hoptoberfest.
For sides....
Kraut - need lots of kraut me thinks! Who's making kraut? Beer kraut?
Pretzels?
Potato chips? Homemade??
(beer) Mac'n cheese?
Pickles?
Beer mustards?
Potato salad? Recipe someone made a couple years ago, it was epic:
http://www.epicurious.com/recipes/food/ ... z1Z9j5Upb6" onclick="window.open(this.href);return false;
Just throwing out some ideas. Try to bring sides that might pair well with sausage rather than random sides you're good at making that will end up being a complete clash of flavours.