I would. There's always a chance your landing will be delayed, and the 90 minute "rule of thumb" for arrival at resorts via DME would only leave you an hour and 15/30 minutes to check in, bring your bags to your room, go back down into the lobby, walk over to the boat dock, get ON a friendship boat to Fort Wilderness, then check in for your reservation. To me, that would be cutting it too close for a prepaid meal that would charge me the full amount if I didn't make it.