I think what you're saying is that you booked a package including room and tickets, but now you want to make a separate trip to Disney World prior to the date on which your package begins and you want to use the tickets from your package which includes a resort stay beginning sometime in the future. Is this correct? If so, no, you can't use those tickets that are part of the package until the check in day for the package. (but you can make Fastpass reservations for the days of the package 60 days in advance of the check in) If you want to visit the parks before then you need to purchase a separate ticket. Then if you link the ticket to your My Disney Experience account you can make Fastpasses 30 days in advance, or 60 days in advance if you book an onsite room for those dates on which you want to make the earlier visit.