Formula Drift Seattle: Will I survive a big event?

Tomorrow Jon and I are attending Round 5 of Formula D at Monroe Speedway. I bought tickets as a gift for his birthday which was on July 11th. I wanted to do something he would enjoy because our wedding is the same month and he worked his birthday, so we didn't have our normal celebration for him. Plus with the babies on the way I know that these aren't things we'll be doing for a few years after they arrive.

Even while purchasing tickets to the event I was thinking "What am I getting myself into?"

I will be 18 weeks pregnant on Monday and I already get easily tired and worn out. I swear Im already waddling, but I think it's just in my head. I can tell that things that would have been no big deal before are now becoming more of a struggle to accomplish.

My main concern being how much walking will we be doing or not doing. I can walk for a little while without too much issue, but after a while I do need to rest and sit or else my back begins to hurt and I get tired.

My second concern was obviously eating, as the event is from noon to 8pm (we'll be showing up around 2 or so.) I did find out thanks to some amazing friends that I can bring in outside food and drink as long as it's sealed and unopened. So I plan to grab some things to snack on in the morning to pack in our bag. I'll probably still buy food while there, but at least we wont spend a fortune eating food there all day, since I'll probably be starving the whole time.

I jokingly told Jon it would be really funny to take photos of me in fromt of cars in the car shows with my pregnant belly, like how they have the hot skinny chicks model around cars. HAHA. He thought it was funny, but Im not sure if he'll actually do it. I still want to because I think they'd make for some really funny pictures to remember the day. If he wont take them I'll rally one of our friends to do it for me. I know someone will. :-P I will definitely post some photos, since I haven't taken any since I was 16 weeks.

So, I'm really hoping I can enjoy the event, maintain my energy, and stick it out so that Jon can fully enjoy his birthday gift. He of course, is willing to leave if I need to go home and rest and is completely amazing in making sure that I'm getting whatever I need. But Im going to try and sit often and eat and drink often, so that hopefully we can enjoy the entire day.