Just did this in December. Seven day cruise on Sky Princess (16- 23 Dec), followed by 14 daus on Emerald Princess (23 Dec - 6 Jan). When they hand out the disembarkation tags for your first cruise, go to guest services a d see whether they are arranging a shuttle tontake yonto the next cruise. In our case, Princess did that for the 40 or so passengers doing the S2S. Makes life a little easier.