Is this the last weekend in June? If it is, I would definitely go and I think it would be worth it. If I didn't live so far I'd make the trip!
We have a regional quilt show nearby each April/May and they always have a guest teacher who teaches for 3-4 days. Even if I didn't necessarily like the project they were doing, it was a lot of fun meeting them, seeing their teaching style and picking up different ways of doing things. The other quilters were fun too!