The DC suburbs — Bethesda, Rockville, Silver Spring, Gaithersburg, Hyattsville, College Park — carry most of the state’s listings and are unlike anywhere else on this site in one specific way: screening is stricter, and it is stricter in both directions. The clientele is federal and contractor professionals with security clearances, and the listings that serve them have learned to be careful. Expect to be asked for more verification than you would in Chicago, expect discretion to be stated explicitly on profiles rather than implied, and do not read either as suspicion of you personally.
Outcall to hotels along the Metro corridors dominates in the suburbs. Incall exists but is less common, and where offered it is usually in the denser parts of Silver Spring or Rockville. Baltimore, forty minutes north, is a different and cheaper market that behaves like an ordinary mid-sized east-coast city — more incall, more independent listings, less of the discretion culture.
The Eastern Shore is the third piece and it is seasonal in the same way Myrtle Beach is. Ocean City runs from Memorial Day to Labor Day and has very little outside that window; Salisbury and the inland shore towns are thin year-round. Getting there means the Chesapeake Bay Bridge, which on a summer Friday adds hours and which every listing there factors into travel fees.
Rates are on the higher side in the DC suburbs, reflecting the clientele, and noticeably lower in Baltimore.