It is indeed very possible. If you are staying at a DD hotel the walk would depend on which end of the hotel area you are at. The ones closer to the crossroads are would be a short walk. Of course the closer to the DDshopping area the further from Crossroads you are and thus a longer walk. There are sidewalks for most of the area. There are several restaurants in the Crossroad area. There ia a McDonalds,Hooters,TGI Fridays,I think a pazza place and I know many others but just can not think of which ones right now.
I would estimate that a walk from the shopping of DD to the beginning of Crossroads would be about a mile(maybe a bit more or less but it is hard to estimate)