Thanks everyone so much for the answers. I really am excited about this and will of course post my experiences.
On the kids thing, it's not that I'm worried about playing strength. There are probably a lot of kids out there much better than me. I'd just feel a little awkward if I'm at a board with a 9-year-old and there is nothing but 9-11 year olds at all the boards around me as well. But it doesn't seem like that'd be the case. I'll just try not to think about it if it is.
On resignation, I generally don't it. If I'm in a lost position, I'll generally just speed up to blitz speed so as not to waste my opponent's time, but I want to always play it out.
On results, I'll be ecstatic with 0.5/6 at U1400. I don't want to get completely skunked, but anything else is fine.
I'm playing the U1400 section (I'm currently rated ~770 in the USCF but I've only played 4 rated games) at the National Chess Congress in Philly this weekend. My first round I got a 1 point bye due to an odd number of players. My next game later that day I was crushed by an 8 year old Indian kid with his father standing behind him with an open laptop (which made me feel like he might be cheating when the kid would leave the room with his father). This morning, my opponent (7 year old Indian girl) showed up with 15 minutes off of her clock and puked. She went to the bathroom and I went outside for a couple cigarettes. Shortly after I returned, she did as well. We were pretty evenly matched but she ended up beating me on a blunder. My second game today, I was matched with a 35-40 year old black male, and I was certainly happy to be playing someone over the age of 10. He was rated 1375+, and I ended up crushing him. At the end, he outstretched his hand. I said "You resign?" just to make sure he wasn't trying to swindle me into a draw and he said "Yes". I hope that this will be the biggest upset of the tournament (not sure if there is a trophy or not). I have two games tomorrow and if I can get 1 point out of it to finish 3.0/6 I will be thrilled. Here is my most recent game: Time controls 40/2 SD1
congrats!
Btw maybe its better to say 6 year old girl or 8 year old boy etc.. rather then "indian" "black", I dont know it just sounds weird when your putting that in your sentence.
Clock hasn't been a problem. I play a little too fast for the really slow time controls on the internet. I try to play 45 45 but it ends up more like 30 30. The natural pace OTB seems much slower and it's easier to take my time.
I *thought* I had the notation just fine, but when I got back to the hotel last night and tried to recreate my games on the computer, I found that many moves were clearly wrong and couldn't figure out the right ones on all of them.
I will absolutely, definitely be doing this again. It'd be testing my wife's indulgence to try another large, out-of-town, weekend-long tournament again, but there are some smaller one-nighters in the area in January. I can probably do a really big tournament once or twice a year.