Good responses, and appreciate the input. What surprised me most was 1) how quickly all of the available sites booked up, and 2) the vast quantity of walk-up sites. According to the COE web site for those particular lakes, walk-up sites are available the "majority" of the time.
That's too bad, because we are meticulous planners (have every other weekend booked through October) but a change in plans caused us to come late to the party when looking at either of the above two locations.
2016 Salem Hemisphere 368 RLBH / 2014 F250 Platinum 6.7 Powerstroke / 2011 Bayliner 315 / T/5.0 MPI