To add some more to Kdog's comments about the Gorge. Yes, you see a lot of Slingshot stuff there, including Tony himself.
The boards that the Sailworks guys are riding are the North Pacific foil boards custom made in Hood River. Now they are starting to get Roberts foil boards, too, into their inventory.
I bit the bullet and got a North Pacific 135 liter foil board for free-ride foiling. I use it with AFS-2 and LP foils, sails 5.0 to 7.0 (I weigh in at 190 pounds). And, holy cow, what a nice ride it is!!! The NorPac guys have uncannily put the footstraps into the inevitable BEST position for foiling. It is stupid-easy to use both front and back straps once you get it balanced for fore-and-aft position of the front wing between the feet.
You can see the NorPac 135 in this youtube: