I looked at his schedule and the two he had in LaPlata sold out SO if you marketed it right there would be some particpation.
The clinic(s) that you are referring to is the same group of people that did his clinic earlier in the year. The group was so impressed with him that they brought him back for a more advanced clinic, and have re-booked him again for next year!
I have been to 2 of his M&M clinics, and to the one more advanced, and would do another in a heart beat. I think that anyone in any discipline will learn from him. His main focus is on how to develop the lope/canter. But there is also some jog/trot development in his clinics as well. He looks to be a mainly WP person, though I have seen him do some amazing things to HUS horses too!
Good Luck!!