I work in Bethesda, right across from the Uniformed school. Bethesda is on the Metro and you can catch a bus from the metro stop to the school. You could also walk it, but its about a 1.5 mile walk. Parking is tough in Bethesda, you should definitely park on the side streets around the campus and walk to the school, otherwise you'll have to worry about meter parking.
There are a ton of hotels in bethesda, most are sort of corporate and more expensive, but there are also a few Days Inn. I recommend staying at one where the address says its on Wisconsin Ave rather than on Rockville Pike, cause Rockville Pike is MUCH further from the school.