Will be on Guernsey June 24 to July 2! Want to take day trips to Sark and Herm. If I understand correctly, I can get tickets for the ferry to Herm on the day of travel. For Sark however, it sounds as though it is recommended to make those reservations "ahead of time". Not sure how much ahead of time that needs to be. I would like to wait until closer to the date of visit to get a better feel for the weather forecast. We will be in St. Peter Port on Saturday (the 25th) morning - would I be able pick up tickets for one of the days that following week for the ferry to Sark?