Where are you tag axle people going today?

Today while driving to Phoenix from the Flagstaff area, I must have seen 30 to 35 Class A coaches going north. That in itself is a lot more than usual for the drive down I-17 but what struck me was of that number, 12 to 15 of those were 40' plus, tag axle coaches. On that particular drive in Arizona, maybe one in ten is a tag axle coach. I assume none were going to Flagstaff...it was in the 20's last night and will be again tonight. Must be a nice convention somewhere.