We are running Gore Canyon (the upper class III-V sections) on June 11-12th in our creature craft. At 800 cfs, its current level which it will be near, is a fun no-penalties event for raft or kayakers, but is still very technical but the water won't be overhelming. Would be happy to show you through there if you're at the pumphouse putin/campground, or let you run one of ours through there.
For your time here, may I suggest a Westwater trip on the Colorado, Gates of Lodore on the Green, both great and beautiful float/rapid rides. For-huge action go on the colorado through Cataract canyon, which takes you out to Lake Powell (kinda far, but hey, burly water that is running scary huge this year).