Also, Given how poorly Romney does with people who make less then 50,000 a year I don't know if he'll do to well on the Eastern Shore or Western Maryland.
He won't do well at all, particularly in farm country. Romney will kill in the I-95 corridor, and Santorum probably does well in the Eastern Shore and especially western MD. Newt probably does best on the Eastern Shore.
Guessing:
Western MD: Santorum, Romney, Gingrich/Paul
Eastern Shore: Santorum, Gingrich, Romney, Paul
Southern MD: Santorum/Romney, Gingrich, Paul
I-95/Central: Romney, Santorum, Paul, Gingrich
Overall: Romney..........Santorum, Gingrich, Paul