hey, good for you on getting your stuff out there! just keep in mind that (in my limited experience, anyway) stores will want you to keep your prices consistent, no matter where you sell your stuff. for example, if a store buys your necklaces for $10 each to sell in their store for $20, you should also charge $20 if you sell at a show. if you charge less at a show than they sell it for in a store, it would encourage people to buy directly from you and affect their sales. maybe this is common sense to most, but i found that piece of info important when i set my prices. i had to make sure that my wholesale price was high enough to make it worth my while to make the product. if you set your "show" price too low, when you split it by 50% for wholesale, you might find you aren't getting compensated for your work.
did any of that make sense? i'm a bit sleepy... best of luck to you!
eta: oops, just realized you make paper goods, not jewelry. but the theory is still the same.