JGBB04 is from south of you and will be heading up but not sure what time. You definitely won't be the only one there so no worries. From those that have said they are in since the final details were posted with you there should be 7 of us with another who is going to try in the afternoon. There are a few others that said early on they were in but have not confirmed.
Hard Rock is a good place to get a feel for what your H3 can do. There is everything from smooth easy hill climbs to not even an option for a stock vehicle. We will see a variety of obstacle and you can decide what you want to do and don't want to do. There will be no pressure to try anything and those of us with more experience to tell you want you can easily do and what to avoid. Should be a great time.
Remember to have $25 for when you sign in. It might have changed since I was there last but used to be cash only. There are also several placed to get something to eat near by so you can bring lunch with you or head out to pick something up and come back.