I went on the V.I.P. guided tour today (4-29-13) with my dad and two of his sisters (all who are 65+). Our tour guide "G" was hilarious and very knowledgeable about the stadium. We were able to make all of the stops on the tour. Suites, Locker Rooms, Owner's "man cave", The field.
At the end of the VIP tour, you can wonder around as long as you want. It was really a lot of fun. I would highly recommend it to anyone. The link at the bottom of this review will take you to their website where it will tell you if there are some areas restricted on the day you are planning.
http://stadium.dallascowboys.com/tours/tourInfo_BlackoutDates.cfm