If you are looking for some shady spot next to a babbling brook for a camp spot, you won't find it in unit 90. But there is plenty of public land with only sagebrush where you can camp if desired. We just pull the trailer off the road in an open spot and and set up camp. Seems like there is some campground in the Eden / Farson area, but never stopped there.
80%+ of the bucks are killed on opening weekend. But you will have a higher quality hunt / experience if you go the second or third week of the season. There really isn't a bad time to kill a buck, and with some more expereince you can use the crowds on opening weekend to your advantage.