I want to start by saying that AKL is an awesome resort

. A split stay is a great idea, but spending 10 days at AKL would also be a great trip. I think I would keep your reservation as is for now and try to change later if/when a discount comes out. If you go with a split stay now "in hopes" of a discount later and nothing comes out for your dates, it could be hard to get those nights back at AKL. If you are paying rack rate, it might not be too hard, but adding nights later is more difficult than taking them away. Also, it seems discounts for the Poly have only been around 20%, while other deluxe resorts have been 30%. With that said, even if you have the Poly booked and a discount does come out, there is no guarantee that the discount can be applied to your reservation as there has to be availability under that discount. Sometimes you have to be flexible with your resort in order to take advantage of a discount as having a reservation already in place does not guarantee a discount can be applied. Good luck

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We didn't think the buses at AKL were bad at all. The buses only service AKL and Kidani, so there's no sharing with any other resorts. It does take a little longer getting around (maybe 5 extra minutes), but nothing to make the transportation a reason not to stay there (at least not for us). Since you're going for 10 days, a split stay is a great idea (especially splitting with the Poly

), but I think 10 days at AKL would be a great vacation too.
We've also stayed at the WL and love taking the boat to MK, which is also convenient to the CR for a variety of dining/shopping options as well as being able to hop on the monorail to visit the Poly and GF. The WL is a beautiful resort with a relaxing atmosphere, great pool, and great CS options.
Not to confuse you more and make your decision harder, but we love the Poly and it is a vacation within a vacation to us

. The tropical atmosphere is beautiful, the volcano pool is awesome, and you can't beat having the beach for watching the fireworks. Some do say that the pool gets very crowded, but we didn't find that to be the case during our stay and we also spend alot of time at the pool. If the Poly is doable, I would split AKL/Poly; otherwise, 10 days at AKL would be a great trip, IMO

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The longhouses are undergoing a refurb, but I don't think it's interfering too much with other parts of the resort.