Daves70, I say go, just be smart and be prepared for anything.
Bring some chairs, one for you and a buddy. Why? Unless you have a can to pee in or want to sit around for hours by yourself it is always good to have a buddy catch your back.
Make some signs stating "LOOK But Don't Touch", place them on your wipers and windows.
Roll up the windows and lock the doors. This keeps sticky hands and less than respectful people out of your ride.
Unless you have a more than great looking engine bay that wants to be seen, leave your hood closed. If you want to leave your hood open, you may consider taking off your fender tag or using non-standard screws to hold it down. Staying within eye shot of people hanging around your engine bay too long and/or removing any quick disconnect items. (Don't forget the signs "Look but don't touch"
And for you more proactive people a bat sit'n right next to your chair in plain site always is good insurance!
NE1 else got anything to add that might work for them?