We stayed at Port Orleans Riverside in December, it's a lovely hotel. We also visited the pool at Port Orleans French Quarter and that seemed like a good choice too. So either of the Port Orleans I would go stay at again
The DDP is more difficult to advise. We had it for the first 10 nights of our stay. We wouldn't do it again (unless we got it free) because it just didn't work for us. We found the children's menus restrictive and boring. It was literally too much food for us, none of us are dessert eaters for a start so that was always pretty much a waste. Have a look on Allearsnet.com at the menus of the places you would like to visit and see if it would be beneficial for you. I know a lot of people have found it great and it works a treat for them.