If March looks like last week did by the time the park opens for off property guests Remy and Frozen will have waits well over an hour. Future World is a better option then in my opinion. Official rope drop for off property guests is just going to put you in the back of the line for the biggest attractions. My thought, and I could be wrong, is don't rush to those attractions...just let the initial crowd clear out a bit and then go. If necessary you can use ILL. Wait times for Future World were more manageable last week. Hope you have a great time!