I just checked out the link and discovered that's it's only 50 miles from me (but still a 2 hour journey because the trip requires riding a ferry)! Unfortunately, I only just stumbled upon this event from reading your post and unfortunately the event is now sold out:
STRUM just hosted Kevin Carroll for a couple of workshops Sat the 23rd and Sun the 24th.
Kevin is scheduled to teach at the Port Townsend event. If you want to learn the Blues, Kevin
is a wonderful teacher. We all had a great time over the past couple of days.
They start selling reservations in November of the previous year, and though you don't need pay in full until August, the seats go fast. And AFAIK, they also start a waiting list early on for cancellations. Worth a call though! I look forward to it every year.