I've done this many times.
Don't get a table. Seriously. Don't bother.
Waste of money, waste of time.
I am not an unknown flogging a POD. I've sold more than 20 novels to large publishers and have a loyal fan following. I've been the frelling guest of honor at conventions, I've been to cons that had over 14 thousand attendees strolling by--and
not sold a single book!
1) You won't get the publicity you think you'll get, because you'll be just another book seller in a room full of them.
2) You won't stand out as a writer, because there will be plenty of them roaming around or hanging at the bar.
3) You have to man the table all freakin' day. It gets old, fast, and when people don't stop by it gets very discouraging.
4) You will NOT make back your investment. Add up table cost, gas to get there, hotel room, food, cost of the books vs. the possibility you will sell oh, let's say five books. No way will you break even, much less turn a profit.
5) Some of the more savvy attendees won't touch a POD book, however charming and talented you may be. They will want to spend their money elsewhere and do.
Go to the con to enjoy it for its own sake, to learn, network, and make friends.
Contact Guest Relations and ask if they will have an "artist's alley." Some cons offer free tables to writers and artists that you can use for a specific time period to pimp your book and give away bookmarks with your web addy.
You should not push to get on as a guest, because most POD books don't count as a professional credit. (No advance against royalties usually means it doesn't count on your writer's resume. I don't make the rules, that's just how things are for now.) However, you can ask if they will have panels on POD publishing, and can offer to share your experiences there with others.
You can ASK if they would consider extending you a guest pass, though. Never hurts to see if they won't bend things a bit, especially if you're polite about it. Guest relations folk often have to put up with a lot of a&&holes,
you want to be the refreshing exception in their day! If they say no, suck it up and smile. Everyone has to pay their dues.
Make sure the person you contact knows you're a neo with a POD book. Don't try to make yourself out to be more than you are. You will have to be humble. It can be hard, but it will serve you better than
being like this person. (She also writes horror, has a book with Publish America and 3 with a POD press and is convinced she's a bestselling author, even though the NYTimes never heard of her. It's a good cautionary tale on what not to do. Enjoy.)
If they do give you a turn at an artist's alley table, turn up on time and be charming. Let your book sell itself, give away bookmarks. Have fun.
Otherwise...no table? NO problem. Enjoy the con.
Attend panels on writing and publishing so you can learn from writers farther up the ladder. Yes, I have sold more than 20 books, but you betcha I'm in the panel rooms taking notes the same as any newbie! There's always something new to learn.
Make friends with other writers. If you get the hairy eyeball from a pro (you'll know it when you see it) for having a POD book, don't let it bother you. Be friendly, relaxed, shake hands, talk about the craft, but not your book, not unless someone specifically asks.
Make sure you have your one-sentence TV Guide style plot synopsis ready. Avoid glazed eyes--it has to be one line. (My book? Oh, it's
Queer Eye for the Straight Guy meets
Relic, but with a higher body count--especially when the aliens land!
)
Check out the parties, be open to meeting all kinds of folk. The people you meet could end up being lifelong friends!