We stayed at Cherry Hill and liked it (although that was a long time ago....maybe 11 years now). The place was clean and well-kept. What noise you'll hear is from passing traffic as opposed to loud neighbors. Given the area of the country you're in you won't avoid that. Sites were a bit on the small side but again real estate is very precious there.
We used Pohick Bay Regional Park in Lorton, VA as our home base for a week of touring all the DC attractions. If you have your own transportation to the metro, no problem to get around. Worked out great for us. Large private sites. I have a previous review on this site if you do a search.