spring council is exit 197 off the 90. go to a wal mart and ask a dirty kid. you will get there.
they lready have a spot picked either in anaconda or crzy mountain. but honestly in my opinion im probably never going to another rainbow again. as matt mentioned , yeah its like a small version of the world, and if you'r anything like me you realize, most people in this world fucking suck at life. you will find a small handful of people that MIGHT be slightly on your level, and they will be heavily saturated by the crowds of stereotypical hippies and hipsters who steal from cultures sacred energies and provide no backbone to the great purpose that was created for it. hippies spanging dirty kids is just unforgivable. the only thing that works for small groups getting fucked up is mean circles. it sucks but its true, or else you will just work your ass off and not get buzzed off the shit you bought...and FUCK the shwilly kids who dont know their limits. it feels like a big high school party with bunch of amateurs runnin around who don't know how to handle their booze or drugs.
now all that aside, i agree if you haven't gone before and really feel like you should see what it's like, go for it. i went early for holding camp and spring council. to be honest i'm already sick of it. if you don't like getting constantly spanged and bothered for your drinks weed or tobacco, go for it, also, don't expect to sleep consistently, or much at all...ever.
exit 197 off the 90 in montana. ask around. good luck