We have a party of 6 (my family of 4 plus my sister in law and her partner) traveling to WDW around Thanksgiving. My family of 4 has a one week earlier check in date than my sister in law. In other words, our WDW trips overlap on the second week of the respective vacations.
Since my FPP window opens earlier and we are all linked can I make FPP reservations for the entire party of 6 at that time? I will only be making FPP for those days my sister in law has park tickets, but it would allow us to ride hard to get rides like FOP or SDD together. I thought I read that onsite guests can make FPP reservations for offsite guests at 60 days for linked reservations, so this would be similar except that my sister in law and her partner are staying onsite but just have a later check in date.