I agree that this would be a great gift trip (depending on what level of wheeling and mods are on the Jeep)
If you decide to research this, give them a call. I talked to a lady named Glenda and she was very helpful.
Fyi, there are 2 separate events. One is Jeepers Jamboree and the other is Jeep Jamboree. I was going to do Jeep Jamboree but regardless make sure you get the info on them both to choose the right one. I would also HIGHLY agree with spending some extra days in Tahoe, its awesome up there!