I've hosted one, and participated in two others-I think allowing enough time for you (and the others) to get it all done is a biggie! It's crazy how life gets crazy, just when you think everything is under control (whatever that means LOL)
Good Luck! I tryed to host a swap but became very ill and dropped the ball completely...then I had to email everyone and say I was sorry. I felt really really bad about that! Almost decided to hide away from the farm! But, I don't like to hide from mistakes and I love the farmgirls here. Anyway, make sure you can follow through and you don't get sick! Ha!
That's the beauty of this forum-lovely ladies who I'm sure understand that life gets in the way (I hope, because my stuff didn't get out before my trip, so I'm feeling like the White Rabbit myself ;)