are you tripping with 6 people or going to get shrooms with 6 people?? If you're going to get them I'd go with less... we go with 3 two for the field and one for the car... if you're tripping with people it doesn't really matter, i've tripped alone and had a great time and with a big group and did as well.. been in trouble in both situations too, but it's nothing too bad. If you're going to pick, take less people though for sure.