Lantley wrote:
One of the reasons to stay at Cherry hill is they cater to tourist. They have night tours leaving from the CG. ......
That might appeal to some, but during the ongoing Covid pandemic getting on a crowded bus at $120/couple and touring the monuments in the evening would not appeal to me.
Whether I stayed at Cherry Hill or Greenbelt, I would prefer to stay downtown for dinner, tour the monuments in the evening and return on the Metro which is likely to be virtually empty.
Once you visit, getting tourist information is not an issue. I would suggest doing some advance research to pick attractions that are most interesting and convenient for you.