Now I can't wait for a trip to the caverns! It's a shame we cancelled twice.
Were there crowds? We just got back from Zion and Grand Canyon and found only light crowds, much different than visiting during peak.
Caverns were by appointment only...so at 8:30 a.m. (first time slot) there was hardly anyone around. Second time (8:30 a.m.) we did the hike to the Cavern and wasn't too bad. When we left later (both days) it was more busy. Earlier appointment seemed to be the ticket to avoiding crowds.