As the spring rolls around typically there will be more inventory on the market, so March, April and into May is when typically the most homes are on the market in the area. Five days could be enough time if you and your Realtor do some homework before time to really lay out your needs in the house and then when you are in town get out and see as much as possible. I have had clients find the house on the first day, it really varies. I would talk to a lender to get pre-qualified, so you know what price range to be looking for and think about what you want in your home (bedrooms, baths, kitchen style, neighborhood, etc). The Washingtonian has run some good articles about schools in the area and occasionally the Washington Post has some articles as well.
Please let me know if I can be of any more assistance or if you have any further questions.