My husband stayed at the Marriott and enjoyed it very much. There were lots of adopting families there and almost everyone at the front desk spoke English well. There are restaurants in the hotel if you aren't able to leave easily, and the best McDonald's my husband has ever been to on the corner down the block
He travelled on Continental and we ended up having to change their tickets 4-5 times. They were very accommodating and provide adoption discounts if you ask (and the person knows what you are talking about!).
Good luck and I hope you get to travel quickly!