So I was just beginning to think this was going to go on forever and then I ran out of popcorn and beer, so for what it's worth at this late date, the Los Angeles Basin does not include the San Fernando Valley nor does it extend to Orange County or San Bernardino County. If you want to include Long Beach, there are only two Dealers in the Basin and neither have free shows. The Rose Bowl shows have dried up and that leaves Angel Stadium (Orange County) and a couple in the Inland Empire. and they are usually ONE BRAND shows.
At Pomona you can wander in and out and through the dealers without an escort. Try that at the FREE shows. You get the next salesman up when you walk in the entrance and that salesman will high pressure you even if you excuse yourself and try to go to the bathroom alone.
The free shows don't have any vendors, oh yeah, the Dealer is a parts and accessory vendor, so there is one.
The vendor tent is useless at Pomona but once in a while I find something I want.
Some of the seminars at Pomona are good but they too are a sales pitch or given by someone who is in love with their own expertise.
And yet it can be a lot of fun if you take your own lunch and drinks. Last year they did have a big shade tent, seating and free ice water.
My DW learned a lot about why we have a 32 foot RV with slides and not a Leisure Van, that was worth all I'll be paying for admission this year and paid last year.