With that many nights, I'd book through AAA. The POR rack rate is 155, I believe AAA rate is 131.75. For ten nights, that's a good savings - even if you have to buy membership. There's a lady here on the DIS who just started working for AAA, I booked with her and she was wonderful! We did get the AAA discount but if anything else comes out that will save us more I know she'll be on top of it. You can PS me if you want her contact info.
We Got Aaa For 46.00 For The Year And It Saved Us Over 200.00 Plus You Save On Different Things Like Food And Souviners In The Park Plus There Are Other Great Things About The Plan. You Should Try It.