Apologize if some of this is redundant info, but I called UNLV/Sam Boyd - after first talking to a girl with a bit of attitude on the 739-fans line, I called the event services number and a very nice woman named Laura was a little more helpful- not much new to report from previous posts:
she confirmed the 6am early line-up at the East Entrance, and I also asked how they were going to monitor the pit, she said she believed they were going to use wristbands to control how many are allowed in.
I found a facility map on the UNLV website to show were the East Entrance is:
http://www.unlvtickets.com/pdf/facility/fb-sbsConcession.pdf
Since I plan to cab it there from the strip, I asked about cab availability afterwards. She said they have alerted the cab companies about the concert and there should be plenty available.
Just in case though I also called the Las Vegas bus co ("CAT" Citizen area transit).
To get back to the strip from the stadium:
-Take the special event 601 loop from sam boyd to tropicana and Boulder (runs until midnight) fare $4
-then transfer to the 201 West on Tropicana to las vegas blvd (runs 24 hrs)
-Then transfer to the Strip bus North (no #, they call it "THe Deuce") runs 24 hrs, and you have to pay an additional $1
She said depending on traffic and wait time, could take 60-90 mins overall...
That was awesome. The teller that helped me was really nice, and she was asking me about what we planned on doing. I told her I was going to the concert, and it turns out she's a huge U2 fan as well. So fun to meet fellow fans in random places! 
