I'm finalizing our Christmas itinerary and wanted to ask for suggestions in organizing day trips. We'll be staying a week in Grindelwald from the 24th-31st after coming from Basel and Bern. We'll be leaving for Zurich on the 31st and heading home the next day. We want to go to Gimmewald, Les Bains de Lavey, Gruyeres, the Chateau de Chillon, and possibly Lausanne. Is there a good way to organize this? We have swiss passes so I would also like to take a good boat ride, perhaps Lake Lucerne? Thank you!