I'm glad I asked because it gives me a different perspective. There is a lot to do just a short drive away (if you don't count the traffic). I grew up in Fairfax (Vienna, technically, but it's all kind of the same) so all those museums and historical sites were taken for granted. We went on field trips to them every year in school. After a while, it all gets old. Actually, it's kind of funny but one of the stipulations to me agreeing to my dh joining the Marines was that he take me away from there.
I do like to take my kids to the Smithsonian whenever we visit. My family is there so we can go pretty much whenever we want.
My dh has told me the billets there are non-deployable. I've also heard they work such long hours that they aren't home much, either. Of course, coming home almost every night even if it is only for a few hours is better than not coming home for months.
Have you all looked into housing in the area? Are you planning to live on or off base? I'm curious what the homes and towns are like right around Quantico. Stafford was the country when I was growing up. There wasn't anything there but farms.