I tried to register from work but the website either didn't like my logging into the link from my work, or maybe it just didn't work. I was able to register from home though.

Zen - there are 2 MD State Parks 40-50 miles away - Martinak, and Tuckahoe. Martinak would be the closer one. I've camped at one of them but forget which one it was just now. The rate for tent camping is only $20/night (this year anyway).

Terry says they are working on discounted motel rooms.