Hawk-eye and the other elder statesmen of the Gorge do have the best information at www.linvillegorge.net
The Gorge Rat "is that the best you got loop" has a wide ford to deal with (80 yards - someone please correct / verify). That might be a bit nippy in mid March. I completed the loop on an overnighter with someone who had done it before; the trail is not clearly marked and DO NOT use NatGeo map of the Gorge.
I woundn't want to tackle it for the first time on a solo, YMMV.