We went along to have a look last night. Unfortunately, it wasn't really for us. My son is the one who persuaded us that we should go because he assumed with bikers involved, there would be some good heavy music - far from it while we were there.
Having said the above, it did seem to be a well organised event. The stalls were selling a different range of goods to that which we normally see on sale when we go to events at 19 Rai. This was good to look at, but well out of my price range - over 20,000 Baht for a waist coat as an example

It was nice to see how the other half live
There were some fantastic bikes parked around the park to look at. There were even a few for sale at what seemed to be hideously low prices. Some were being sold for less than what my son's Scoopy cost.
They seemed to be doing what they were there for - a very good job of fund raising. There were a few Pudsy Bear moments with schoolkids presenting cheques to the fund. The auction seemed to be going great guns (sorry for the pun for anybody who was there) as well. I wonder if they will actually publicise how much the event raised - it was looking really good while we were there.
Even while we were there, a party atmosphere was building, with people dancing at their tables. It certainly had potential.
Unfortunately, the thing that I wanted to see, the tattoo competition, didn't take place while we were there.
If you are into bikes, and the strange genre of music that was being played, it must have been a fantastic night. Not for us though. I'm glad that we went to see what it was all about, but personally, I won't be rushing back to another one - a personal choice, and not to detract from a good event.