Thank you to those inspired to explore and create this route! We carried 64 oz and 32 oz of water with Nuun (and a few bars), and this was near my limit for heat and humidity for an unsupported run with no water available on course (restrooms ~5 mi are closed). I don't know how safe the streams are for a filtering water bottle but that could be something to consider. We drank nearly as much water at Avalon after finishing as we had during the entire run.
We added a mile or so going off course. Portions of trails east of River Road have been rerouted (once we backtracked only to find the next trail also closed), but mostly we turned too soon or guessed incorrectly but quickly realized our mistake. Having not scouted the course, simply watching the GPX route in WorkOutDoors' OpenStreetMap worked well, with the 'Off Route' notifications preventing any major diversions.