We were lucky enough to be invited by a supplier to attend SEMA about 8 years ago.
This makes any of our NEC type shows look like a local community hall jumble sale.
The organisation was megga, coach collected us every day , dropping us at the hall door we finished at the night before. Two & a half days it took us to do most of it.
Got some great leads with new worldwide suppliers.
A very worthwhile trip but not cheap these days with $ exchange rate.