Saw your post also on Bogley. With a rig that big, I would give Temple a try. Not sure how much weather the area's been getting, but that road can get boggy towards the freeway, so go in from the bottom if it's been raining over there.
Also, the Wedge isn't a spot for canyoneering, but the campground's nice up there. May be full this time of the year, though. Buckhorn should be good - you can also go in from Elmo, more direct.
If you're not familiar with Udink's blog, check it out. Lots of cool places around Price on it, he also has lots of posts on the swell. I think it's udink.org