I have shown in Monroe, MI, Indianapolis, IN and Portland, OR. I flew to Sarnia, Ontario and drove to Monroe and Indy from there . . . so it wasn't too bad.
I actually don't show in the US very often, because it's far (everything is far from me!) and expensive, but the US shows are fun.
Specialties are usually single-breed shows, but sometimes there are Group shows (Sporting group) or multi-breed shows (like the ASC Flushing Spaniel show in January in Philly). Farley only ever showed in obedience in the US, and he won't be going back, because I won't vaccinate him anymore. Jack Jack showed in conformation - both a Specialty and some all-breed shows.