My husband and I would like to visit the Vietnam Memorial, WWII Memorial, Holocaust Memorial for starters. This will be our first trip to DC and are thinking of Oct. Is that a good month to go or would you suggest a better timeframe? Am I correct in assuming weekdays might be better than weekends? I have a mobility/leg problem, using a cane, and would appreciate suggestions for hotels that aren't too far from the above, if that is possible? Also, something mid-range for seniors. How far is the Smithsonian? Any ideas or additional pointers? Thanks in advance!