I hunted NE Wyoming this fall. Although I am no stranger to hunting out west here in Canada, it was my first hunting trip states side and first time hunting Antelopes. I have to admit, I was prepared for the worst in terms of hunting pressure and having an overall hard hunt. I knew access was limited and I had warnings of private land owners posting public land.
I wasn't really prepared for the "poor" access to public land. I ended up tagging my Antelope on day 4 of a 5 day trip. Day 1 was mostly scouting and getting the layout of the land, the unit I hunted was small enough to pretty much drive the whole thing in one day. Day 2,3 and 4 were mostly hunting days, at that point, I had 5 pieces of BLM land that had easy access and those are the ones I hunted. Due to the weather and extremely low visibility, I had a couple days where I couldn't sit and glass, so it was mostly driving and still hunting. On the last day and a half, the weather cleared and I was able to sit back, glass and make moves on antelopes and was successful in doing so.
Like I mentioned above, I was prepared for a lot, one thing I actually wasn't prepared for, was the frustrations associated with being close enough to public land that you can see it but couldn't physically get to it because it was landlocked by private land or roads. It wasn't an impossible hunt and I will most likely hit the same unit next year if I can.
One last thing, some of you have posted very good links above, I just realized that a county road that was posted private is actually public, so next year if I draw a tag, I intend on hitting those two BLM land. As a Canadian non-resident, I was really reluctant to "push my luck", if I saw posted land, I moved on, but now I'm actually starting to wonder how many times I turned around because some gutsy land owner posted a road or parcel of public land...
My advice to you, even when you think you have done all your homework, do more research. I thought I knew all the information I needed to know before making the trip, I was wrong.