My state fair is doing a beer/mead/cider competition this summer and the instructions say they are only accepting crown-cap bottles this year. I am not really interested in going out to buy bottles, caps, and a capper instrument just for this purpose. Does anyone have any advice?

Is it unreasonable to ask my LHBS to let me use a cepper on site. Should I try to make friends with a homebrewer that has one? Or should I just bite the bullet and buy the stuff and look at it as an investment in future comp entries?