I have tons of questions..I've never been there before but plan on going this year..

1~Do they hold a us national atv jamboree there were like 20000 people go each year??( I heard this, but on there web site the only events I saw that looked good was the atv and dirt bike jamboree April 28th to May 2nd...and the dirt days late June) I thought the national one was like a week long..could be mistaken though...If they don't hold it..which is the best event??
2~If you know...what are some of the best trailheads to ride on for atv's???? I know there are like two were you can get town access real easy.
3~its about a 6or 7 hour drive for me.....is it worth it???
4~What do you recomend to a first timer??? (things to take down there...events to go to..trails to ride...other things to do...places to eat....anything..

Now I've already been through there website but I want the info coming from people that have been there..so if you could give me your own input I would appreciate it greatly!! thanks!!!