Complex sentence: Most mountain huts are tended to by Alpine Club personnel throughout the mountaineering season, who prepare meals and drinks for mountaineers, similar to a restaurant, but usually with a limited selection, as it is not always easy to transport the food to the hut.
Split into simpler sentences: Most mountain huts are tended to by Alpine Club personnel throughout the mountaineering season. These personnel prepare meals and drinks for mountaineers, similar to a restaurant, but usually with a limited selection, as it is not always easy to transport the food to the hut.