We flew sw, it was 20$ to reserve seats that maw did not pay for, so we didnt do it. Then we got bumped from the flight, it was overbooked and they bumped almost 20 people! Worth the peace of mind to pay. Absolutely take a stroller, there is a tram that goes around gktw but its very sporadic and hard to catch. The village is large so depending where your house is it could be a lot of walking to the restraunts, pool, playground, etc. Also i dont think you can rrnt strollers at downtown dismey. Get something large and distinctive to mark your stroller and use zipties or some other eay to attach it that is hard to remove. We had two strollers stolen during our stay, one a case of mistaken identity but the other they took all our stuff out of the stroller and threw it on theground to take it