We have done the ATV excursion on our July 2016 trip. All ATV’s follow one another, so you only go as fast as the leader is taking you. (Hubby a bit disappointed by that). We went through beautiful trails, hills and to a river bed.
if you have a few hours available, I’d go to the Dog Kennel area. I can’t remember if we hiked or took a bus there, it was free and interesting.