fwiw. i'm pushing ~80gi on my current ride, and i'd probably drop it to something mid seventies on this century.
if the cue sheets are similar to last year, hills are spaced nicely. though i bailed before going into the bronx, land of the hills -- i was cool with that -- i would have ridden ~125-30 miles total that day, (bk->cp-century->cp->bk). at least that was my estimation.
it was damn hot last year with the mess bag. i think i'd want to get a small capacity saddle bag for tools, etc.