Are you using Magical express? or Renting a car? or Car service? or Taxi?
Land at 11:00 - which mean the wheels hitting the tarmac, taxiing to gate, disembarking the aircraft, bathroom break on the way to the luggage carrousel, luggage pickup, heading out, drive time depending on how your getting to the resort, if you are riding magical express there is a chance that you will have other resort stops, or some wait time while the bus fills up. Renting a car time to rent and find your car, get in and drive to the resort, if you go this route have your mapping ready to save time. Car or Taxi service will take you to the resort check in - Checking in, finding your room, throwing the luggage in, bathroom break, heading to the bus stop, waiting on your bus...
Also other things to consider, if you are renting a car or using a car service of some sort are you planning on a quick stop for snacks, water.. etc..
Are you ordering from garden grocer?
Over all I think that you can make it, its totally do'able. Even if your running 15 minutes late or so you should be fine. Over Christmas DH and I were late to Chef's de France ADR for dinner, due to issues with the boat from HS, and they still seated us with no problem.