Just an FYI, Myrtle Grove rifle range will be closed for reconstruction for 120 days this winter.

Exact dates are still under discussion, I'll post again when I find out.

Where is Myrtle Grove and what are the facilities like?

Myrtle Grove Wildlife Management Area  is in Charles County about 5 miles outside LaPlata. hours are 9-6 Mon-Sat, 1-5 Sunday. Winter hours are the same except it closes at 5pm every day.

they have a 4 bay, 8 station 100yd rifle range that does not have official range officers. One of the regular shooters will usually run the line.

they have a Shotgun range for clays and birdshot (slugs and buckshot shooting use the rifle range)

you need to buy a $20 yearly permit (runs 8/1-7/31) from any location that sells hunting liscenses ($250 fine if the DNR cops catch you without)

Targets must be hung from string run between the baffle supports, you are not allowed to have targets resting on the ground.

http://www.dnr.state.md.us/publiclands/southern/myrtlegrove.asp
Myrtle Grove WMA is located in Charles County about 5 miles west of LaPlata on MD 225. Take U.S. Rt. 301 south to MD 225, about 5 miles south of Waldorf. Go west on MD 225 to Myrtle Grove WMA. For additional information contact the Myrtle Grove Work Center at (301) 743-5161

I may be there tomorrow, and I'll ask. If not, I'll see some of them this weekend.
I know that they are some environmental concerns, and HOPE it isn't going the way of many ranges.