I'm in Frederick County. What are the ages of your children? The entire county is one school system (as is all of Maryland). That said, some schools are better than others. Middletown, Walkersville & Tuscorora are good high schools in the county. Urbana & Linganore are too - but are further from Detrick than I'd want to commute. The Frederick city high schools are Frederick & Thomas Johnson - TJ being the better of the two. Of course, friends with honor students are satisified with Frederick High. Catoctin High would not be my first choice - however, housing prices are less in there in the northern part of the county.
Since you will be working at Ft Detrick, I recommend you locate West of Rt 15. Drive the route during rush hour prior to committing to lving somewhere. A 10 minute drive in non-rush hour can take 3 to 4x as long during rush hour.
What type of home are you looking for? I have to warn you that home prices are outragouse here. There are several nice developments right next to Detrick - the average home price there is $600,000+ for homes 10 year old or less. The homes in the older section go for $400,000+. That is pretty typical of all of Frederick COunty. PA and Washington County are cheaper but you will have to commute.
PM/Email me if you want specifics.