Go on a saturday ...Not when they open the gates...but during mid-morning/early afternoon and just hand over the notice..
Dont say ur coming for early FP,,but do have a valid reason to convince them, if asked so..! Be Nice...and hope u wud be allowed.
Good Luck..
There's really no advantage in early FP...from observation made out here in this board..But u lose nothing in giving it a try...So just do it...