The Harvest Classic is great. A number of us Texas folks have been several times. Lots to do and lots of great riding around there, too.
Don't be scared away by threatening weather forecasts. I didn't go last year because of a 100% chance of rain on Saturday. It didn't rain a drop...

Yea, I didn't go either on account of the weather "report". Although it didn't rain that w/e, it rained quite a bit before and was really muddy through the w/e.
A buddy and his son went every year (including last year) since his son "accidently" discovered it online 8-10 yrs ago.
They camp Friday-Sunday, do the Fun Run on Friday, movie thing on Sat, etc...
It is a good, fun time. The wife and I are planning to go Friday. We got a thing back home on Sat so plan on heading back early Sat morn.