They release all summer, but a summer release is about 7-800 cfs which is about 3 feet and kinda fun in a kayak.  End of year they dump a big release for the real boaters not summer raft gapers from NYC or Philly.  September releases are around 2500 cfs and maybe 6 feet or so, much more fun in a raft.
It could be done in august but unfortunately I'm busy all of august except this weekend.  I'm not sure of the price of renting a raft either.