5-night personal stay as a Silver? I'd be looking Residence Inn or Spring Hill Suites, period.

If you wanted to knock it down to a Category 5, consider the Residence Inns in Rosslyn or Courthouse. Easy to get to/from DC, whether by Metro, Uber, or even on foot if you enjoy walking/running.

I always check rates for all days I'm going to be in DC. Rates fluctuate wildly based on demand. Your five-night stay might include a $300 night followed by a $120 night. I know the 5-night award is *usually* better, but check to be sure.