Craft Show this weekend

Well I am heading to my 1st ctaft show this weekend to sell cards that I made. I am a little nervous that I either will not sell a thing or sell out too quickly and not have enough to go around. But it will be a learning experience either way. I made plenty of cards and also a few altered journal note books. I may make some bookmarks too but not sure if I will have time to get them finished before the weekend. I am planning on making for future shows some altered picture frames too. I did try to make some altered gift boxes that you can store the cards in or use for gifts but the mod podge makes the lids stick to the box and rip the paper. Even after drying a few days. I only did 3 so I am glad all my effort wasn't wasted making a whole bunch just to have them ruined. Anyone know of a different type of sealer that will not remain somewhat tacky and ruin your work? Would love to hear of an alternative or even some other ideas that I can make and sell. I will post some pics later of the cards I made and even some of the craft show itself. Wish me luck!! Thanks for looking and have a great day!