The key according to GR is that the park reservation be linked to your ticket. Also, day passes are now date specific. So, if you are trying to make park reservations on a day which the AP is blacked out, the AP is no good so there won't be any conflict and the park reservation will link to the other ticket as long as the ticket is good for that date. The only problem comes up when you try to make a park reservation on the day were both the day ticket and AP are valid. We had a situation where we had a 1 day ticket and made the park reservation before buying the AP so it required some straightening out to move the reservation to the AP and transfer the day ticket to another person/date.