This looks like fun, 62 miles of gravel and 5000 ft of climbing. I'm building a vintage "gravel" bike this weekend (I'm rebuilding my 1993 Trek 950 to use for gravel rides).
If I were to do it, I'm pretty sure I'd be challenging you for last place.
On epic rides like this, my only goal is to have fun and enjoy the beer after the ride. I figure if I get so beat up that I just want water afterwards, I've done the ride all wrong.