If I might I would suggest the Marine Corps Musuem at Quantico for your list. Figure on a half day more or less.
Mrs alfa 6 and I did Gettysburg, Antietam and Harpers Ferry a few years back. You could probably do them in a day and a half but two days is probably a better time frame.
FWIW we stayed in Thurmont, Md which is about 30 minutes from Gettysburg, and 45 minutes from Harper Ferry and maybe 30 minutes from Antietam. Also the room was way cheaper than almost anyplace else, it was a Super 8. And you are maybe an hour from Washington DC, depends on the traffic, ha ha
Good Luck on the future nuptials
Best Regards
alfa6 ;>}
A second on Gettysburg and Antietam.... I guess i was thinking of no further north than DC, but Harper’s Ferry puts you in the neighborhood... Thurmont’s also a very nice area, but I doubt it was a Super 8 I stayed in... Gettysburg is real near the whole Pennsylvania Dutch region... For super-cheap, I stayed in Hotel Americana before I moved here. It was very cheap, and decent, but it’s been years. Crystal City moved North to swallow it, where it once had been on the Northern Edge of the built-up neighborhood... Now, Crystal City is mostly dead, but Hotel Americana is lost among towering apartment buildings.
If you happen to be Catholic, and you happen to be in Thurmont, you should also check out the shrine in Emmitsburg. But, whereas I’d recommend the Basilica in DC to absolutely anyone, Emmitsburg is a Catholic thing. IF there’s cold weather, Ski Liberty is right nearby; it also has some fun snow tubing. Aspen, it’s not, but if you’re from West Texas, I don’t imagine you’re ready for Aspen anyway?