I'm thinking of doing a contest for some UU and Kamaka Shirts singed by Jake and Aldrine. I'm going to a Jake concert soon, and seeing Aldrine in Kauai. Would signed t-shirts be a good contest idea?
To me, a "contest idea" is what you ask people to do to win prizes. I think UU and Kamaka shirts would make nice prizes for a contest, but the success of a contest ultimately depends, at least a little bit, on what people are asked to do to compete for the prizes. And it's thoughtful of you to get autographed swag for the purpose of giving it away.