april is definitely busier, id choose feb just for that fact. last year when we went to usf during a weekday in feburary it was so quiet. we had the oppertunity to walk around the amity/new york areas while it was deserted with only the production crew in site. it was a little chilly but with jeans and a sweater/jacket the weather should not be bad at all. like barry said its luck of the draw when concerning the weather.