John,
I have reached out to some of the crawlers I know here for more pics of Belle Isle. This is a state park which has a web page with some pics.
Richmondoutside.com » Belle Isle (JRPS)
I also sent you a PM with a contact that might be able to help.
This where where VARCOR ruled when there was comp crawling in VA. Sadly it does not have accessibility for a National event. Difficult and long trek for that kind of event. Also its very sensitive to rain, one day it can be above water and the next below depending on mountain rain/snow melt.
Kbrog, Mariner, and I have crawled every inch of that place.