Help me get away

my class is planning for a staycation so there's gonna be a sleepover consisting of 30+ sweaty stinky fuckers all shoved in one (perhaps two if god allows) villa unit, and i absolutely could not careless about this stupid dumb thing and i DO NOT want to participate but these bitches as usual is pretty fucking pushy cus yknow they need money first to even make this a reality but i DO NOT care. i'm a bit scared i'll end up getting more isolated than i already did if i didn't go, but going is NOT an option.
is "Because i don't want to go" a good enough reason for this prickly cunts or should i procure and elaborate a lie? should i tell them a relative of mine is dead so i can't go or something