
Originally Posted by
applegum
Anyone have any experience with this sort of riding and have any words of advice? Or headlight recommendations since there will be a lot of unlit night riding?
Heh, you've come to the right place, grasshopper.
Words of advice? I dunno. Run & hide? 
To get you started, do a forum search on the words brevet, randonneuring (assuming any of us spelled it correctly, heh), RUSA (that's short for Randonnuers USA, the governing body for randonneuring in the US), permanent (what randonneurs call the self-dictated type of brevet), UMCA (UtraMarathon Cycling Association).
You'll find all sorts of stuff -- good, useful, and otherwise
-- from many of us here.
The RUSA and UMCA websites have lots of good info on training.
That should get you started. Welcome to the insanity.
2009 Lynskey R230 Houseblend - Brooks Team Pro
2007 Rivendell Bleriot - Rivet Pearl