plus if youre going to a 4 day fest, which im guessing is Bonnaroo but i could be wrrong
theres going to be waaaaay more offered to you
be safe, have fun and keep a stable but open mind
as already said no on the 4 days. id say two days max for each drug, take a lil bit more the 2nd time (i.e. you roll the first day on one pill and then two pills on the 3rd). if i could make a suggestion i would recommend candy flipping one night.