Be careful booking several days. If you have to cancel half way through you're charged an extra day anyway. Also if you book at National harbor hotel, you'll be paying 24 dollars more a day in parking garage. No pool or tub to bathe in only a shower. So if you're not a shower only person, look elsewhere. After walking everywhere I really wanted to soak in a tub, pool or hot tub. The area in National harbor was nice and everything is close. Also the only have a few Queen size rooms with 2 beds.
We attended a volleyball tournament that was help at the Gaylord Convention Center in National Harbor. I booked this hotel for two reasons. First, I got a great rate on a hotel booking site and second, it is directly across the street from the Gaylord. The staff at the front desk was attentive and courteous. Our room was recently renovated and was clean and comfortable. The fitness center was small but has what you need for a full workout. We did not use the pool but did see some families enjoying it. It was quite small, though. Parking was $24 per day with in and out privileges. The parking garage is across the street at the rear of the hotel. Be sure to have your parking ticket registered at the front desk. The ticket has your plate number on it so once it is registered with the hotel the garage knows the hotel will collect the parking fee. The breakfast buffet was good. Bottom line is not a lot of frills but a clean, comfortable room, excellent location and courteous staff.