We'll be at Cherry Hill CG in MD and will be traveling on to the NC shore, but would like to see Antietam. Is it best to see it as a day trip from Cherry Hill, or are there any campgrounds that we could stay at and use it as a stopover on the way to NC? We have time to "meander." (We're in a 40' motorhome.) I'm not seeing anything on the website for cgs near it, so am looking for other input.