The Hilton Orlando on International Drive has a very nice pool area and lazy river,I got it for like $65 on Hotwire a couple of years ago,unfortunately I visited this hotel in January a couple of years ago in one of the coldest cold snaps in the last 10 years with lows near 25 so I never got to try the pool and lazy river,but they were so nice I spent 10-15 minutes walking the area seeing how nice it was.The prices could be low if there's no conventions going on during your dates,I doubt you'll try using a site like Hotwire since you'll be spending a lot of your time in the hotel but you can look around for the best prices on different sites.That area of I-Drive also has a lot of restaurants and attractions and Restaurant row on Sand lake rd is full of restaurants and about 5 minutes away,if you want to visit the theme parks Disney is 15 minutes away,Universal 10 minutes away and Sea World,Aquatica and Discovery Cove 3-5 minutes away.