The best formations begin after about an hour's walk straight east of the parking area. When you walk through the opening in the fence, you'll pass a small butte (or hill) on your left. Once you get around it, just keep going in a straight line east from the parking area and follow the wash - it's the lowest point in the area and may have bits of water still in it, or mud ripples. If you walk along that wash for an hour, you'll run right into some of the more interesting formations. I'm putting out my first portfolio this year and it's actually on Bisti. Wonderful place, but really does require some hiking. I went in there with an 8x10 view camera and heavy Ries tripods and it nearly killed me.