Closest to Edgewood MD are:

CENTURY DODGE-CHRY-JEEP INC
1 EAST RIDGEVILLE BLVD
MOUNT AIRY, MD 21771

WHEELER AUTOMOTIVE GROUP INC (5-star)
112 RAILROAD AVENUE
WESTMINSTER, MD 21158

TATE CHRYSLER FREDERICK (5-star)
5629 BUCKEYSTOWN PIKE
FREDERICK, MD 21701

LEN STOLER CHRYSLER
11405 REISTERTOWN RD
OWINGS MILLS, MD 21117

OURISMAN CHRYSLER JEEP DODGE (5-star)
12430 AUTO DR
CLARKSVILLE, MD 21029

As for the tech's not taking care with your car, well, that's a problem Chrysler as a whole has to overcome. You don't see the sort of crap you describe at high end dealerships, if Chrysler wants a high end image they better clean up the act at your (and others like it) delaership!

There is NO EXCUSE for what you describe. They can easily have clean coveralls to put on before they get in a customer vehicle, they can have gloves (or hell, wash hands, what a novel concept), etc. I just had my first "Service A" yesterday, and other than a bird dropping (birds LOVE white cars), the car was as spotless as when I took it in.

For reducing temptation to "joy ride", do like I did, take the car in with the low fuel light already lit. And make sure they now you noted the mileage. They put about 5 miles on mine testing for wind noise.