Art cards/ATCs would be wonderful. I love little arts that fit in your hand, can be fulla detail, andsell easy with a small price-- and they take less time to make too. :)

I've learned from past experience that smaller things sell well. Just remember you are going to deal with largely a male college student demographic.

Allo!

Firstly.... your stuff is pheeeeeenomenal !
I'd love to say prepared stuff will sell, but it's always chancy.... whereas commish orders are a lot more dependable for sales.

SO imho I'd say prepare a few things, but put out the feelers for commissions... some that you can have ready for people at start of the show, and maybe a very few that you will do at the show (so you don't have too much hotel-room-homework), and a third sector of them which you can take at the con and send to people afterwards.

That's the way I'd play the hand ^v^

*wing hugs*