I know what you mean. It is frustrating. The "Rally Flyer" includes a schedule. "Lodging Rumford Area" has a list of the most popular places to stay(may be full by now, unfortunately). We all wish information would be posted sooner(no Supp Regs yet!), but everything one needs to plan the trip is there somewhere, including total stage miles(108). You could always call JB. I'm sure he'd be happy to tell you everything you want to know.
I'd think it might be safe to go with last years schedule (http://www.maineforestrally.com/mainesum03.html), but change the Friday park expose to the Mexico Rec Area instead of downtown Rumford. Everything else looks pretty much identical.