Best to check with AM TRAK on the first part of your question. And if you attempt to enter a Military Installation, be prepared for being turned around. I needed to go on the base of Fort Gordon the other day and they make you pull your car/truck aside and they search it thourghly. Hood opened, trunk opened, interior searched, under neath searched, any packages removed and examined. All the while, you are under the gun and at times they use dogs to search.
Now this routine is if you are a civilian. But they can and will stop anybody. If your plan included taking a AG on base.....might not be worth it. And you could bring down grief on your friend too.