I'm kind of in the same boat. Through Triathlons I've learned that I swim well, but don't like it, cycle okay and love it, and run horribly and hate it. As such, I'm giving up Tris and moving on to Brevets. I have considered PBP, but quite frankly the logistics are the thing scaring me the most. My wife doesn't ride, so finding places for her to stay, getting my bike there, all that stuff is what has me most reluctant to do it. As for preparation, I've heard that the best way to get yourself into the mindset of a 1200 is to do all the brevets in one week. Wisconsin has one out of Beloit. I figure it makes sense that this would prepare you well.

I'm actually considering doing the week, but then not doing PBP. Vacation time is at a premium, and blowing three weeks (my whole budet) for cycling, leaving nothing for family visits or vacations would probably not go over well.