I have made the trip to GTR for the last 2 years, will be going for the 3rd year in a row in March.
My group (B to beginner riders, woods and moto guys) always have a great time. The place is huge and there is plenty of stuff to ride for different skills/interests.
RV hookups (water/electric) and they do have a black tank drain area as well. We have always slept in a trailer at the track. Locking the bikes at night (but never had a problem). Usually come in later at night, gates are open, and then just wake up and pay in the morning.
As far as the moto goes, there are 2 tracks you'll be riding:
- Big MX sand track. It is big and long. Fast straights. Berms. Rollers. Big jumps (tables and doubles) etc. Super sandy. They flip the direction every year. Awesome track.
- SX style clay/sand track. Smaller track. Super fun. Can just do lap after lap and never get bored. Nothing too big or crazy.
Trails are fun and flowy. Some tight single track. Very little elevation.
I believe they prep the 2 tracks on Saturday's and Sunday's only. Monday-Tuesday the big MX tracks is closed for maintenance. Prep has been good each time we've went, but with it being sand you really don't even need a whole lot of prep.
Honestly hasn't been busy when we've gone and it was almost like we had the whole place to ourselves. (Sunday in March). Never any sessions. No flaggers anywhere. It's seriously like you have the place to yourself lol. I'm sure on different times/days they might be more busy, but I can't imagine it being too much different.
No need to worry about the UTV/ATVs. The select few that show up just do their own thing and you never see them.
Overall, I would highly recommend making the trip! It's worth trying a new place and if you end up hating it (doubtful), hey at least you tried!