Other options near Baltimore include Dutch Springs in PA and Lake Phoenix in VA. Both are decent sites. Dutch springs is closer but Lake Phoenix usually has better vis (imho anyways). Visibility at both varies a lot though based on students in the water. Weekdays usually have better vis for this reason. They both have several thermoclines and get below 50F at the bottom so plan your thermal protection accordingly. Both also have an on site shop with basic rentals and air fills. Hope this helps and hit me up if you need a local buddy. I’m down in southern, MD. I haven’t dived either site a lot, but am always up for getting wet.