The c&o biking is great. Done it several times with the boy scouts. There are a couple of campground areas along the canal. They are federal, no hookups, portapots, and first come sites on the honor system. One is in Little Orleans. As we were tenting at the time (prior to my getting any type of camper), I did not pay attention to how level the sites were. There is a boat ramp also. Nice for a weekend really roughing it.
I have also been to Brunswick family campground. It has recently changed hands according to their web site. It is not large and is right on the river and the c&O goes right next to it. The trains also run right by it.
You should also check out fort fredrick. It is a md state park and also right on the river at the canal. Md state park campgrounds usually are no hookups with a limited number of sites having electric only but generally the camping pads are level. (I have not been to this one yet). Other md state parks I have camped in have had good bathhouses.
HTT: "EscapeII" 2016 Shamrock 23WS (current)
PUP: "Escape" 2010 Rockwood HW 277 (gone)
TV: "Bruce" 2011 Dodge Durango V8 Hemi Crew
Just us gals (me, Sis and our daughters)
Traveled 19520 miles and 209 nights in 7 years and counting