Met a chum today who had started PBP with 20 kilos of luggage in two panniers, got as far as Loudéac, slept 9 hours then took the train back to Paris. And another who did it unsupported with one jersey, one pair of shorts and a pair of arm warmers, froze to the marrow in the rain towards Villaines so rode a bit faster and finished warm & well under time. I rather like that approach but maybe with a rain jacket.