However you do it, make sure at least one person in your group has wilderness experience, not to mention avalanche safety training for winter visits.
Best of all, you can go any season. Just be prepared to sweat. In winter, it could be six or seven miles of cross-country skiing to get from one hut to the next. (Intermediate skiing skills are required.) And in the summer, it's the same distance for hiking and mountain biking — just without the snow. However you do it, make sure at least one person in your group has wilderness experience, not to mention avalanche safety training for winter visits. As the website states: "Route finding may be the most important skill you'll need."