I just posted the following on your other posting:
The conference center at UMUC was the first one to be booked from what a poster on the DC forum stated.
Here are some nearby hotels that are nice hotels. A few of the locations will take about 20 minutes to get to your event but if you are driving it won't be that bad, I don't think that's a long drive to get to where you need to go.
-Hampton Inn/Largo: $159.00. Directly off of I-95 and not too many exits from the event location.
-Greenbelt Marriott: $219.00 (average)
-Courtyard-New Carrollton: $199.00 per night (average)
-Towne Place Suite-Bowie Town Center. (It's not off of I-95 but off of 50 which is easily connected to 95 where the even location is. I don't think it's too far from the site and what's nearby is a plus. Some places to eat, shop, movies, etc.
-Radisson/Largo: $161.50 average rate (cheaper for the weekend rates)
Just a few choices of some clean and nice places to stay that aren't too far from UMD for those that still need a room. Some aren't metro accessible but if you are driving it isn't bad.