I've not but I would. There is a group of them I used to see aloft quite often when driving into work.
We were going to ride in one when in Sedona years ago. I don't remember why we didn't. Maybe we could not get a reservation. Went to one of those huge gatherings in Denver. Saw a near collision in slow motion. But I still would.
Have gone to Hot Air Balloon Festivals before, but would never go up in one. Flying in an airlines is fine, as well as climbing some mountains in Rocky Mountain National Park here...........but no balloon rides.