i agree with what's been said. as long as you're being respectful of the surroundings, a park ranger isn't gonna give you shit.
set everything up before you dose! obviously your tent, or your bunk in the "yurt." but also, unpack your bags and stuff, know where everything is.
dosing at 3 or 4 sounds good. i like to trip for part of the day and part of the night.
gather lots of wood before you dose.
i went camping once, and we could only stay for one night. so we quickly set up the tent and dosed at like 2 or 3:00. i didn't unpack my bag or anything. after it got dark, and we were struggling to see around a small fire that we were struggling to maintain...i suddenly remembered "I BROUGHT FLASHLIGHTS!" we were in the dark for a few hours before i remembered.
building a fire will be hard. cooking will be hard.
so just get everything set up nice and neat, and THEN dose.
if i'm going for two days, i like to wait to trip til the 2nd day/night.