Spring Cove Marina is a nice Marina and I have taken slips there numerous times. I also tend to anchor near that area because of the Holiday Inn Dingy Dock.
Congradulations on the new boat. You will enjoy your Catalina 30 (Mine is the same year, Hull number 5800). One of my friends at my dock is hull number 5808).
Good luck and enjoy. You plan on staying in Solomons or moving the boat?