Flims, Laax and Falera spent a long time not getting along. Flims was a health resort by the 1800s, with the grand Waldhaus hotel opening in 1877, and Nietzsche took the cure here in 1873. Its first ski course, in 1908, was cancelled because there was too much snow. In 1962 the neighboring village of Laax put up the first lifts on Crap Sogn Gion, and for years the two sides barely cooperated: one lift station was built right up to the municipal boundary, and the courts had to settle where the Flims lifts could cross Laax land. In 1996 the two lift companies merged into the Weisse Arena Group, and the whole thing is now sold in winter as LAAX.
What you get is one of Switzerland's bigger ski areas, 216 km of pistes and 30 lifts, and the most committed freestyle culture in the Alps. The three villages are different. Laax Murschetg is a purpose-built base with the lifts at the door, Flims is an older, greener resort with a grand-hotel past, and Falera is a quiet village on a terrace with the cheapest way in. Five days works because the mountain splits into clear sectors, and because the sixth sector, off the skis, is worth a day: the Rhine Gorge, Lake Cauma and Chur are all within 40 minutes.
The plan starts on a Monday: Crap Sogn Gion and the parks on day one, the Vorab glacier and Crap Masegn on day two, Flims, Foppa and Naraus on day three, Cassons and Nagens on day four (a Thursday, the night-skiing evening if it runs) and a day off the skis on day five. January is a good month for it, but not the week of 11 January, when the LAAX OPEN contest is on and the school breaks are in full swing; the week from Monday 18 January is cheaper and calmer. Sleep in Laax Murschetg for days one and two and ride the free bus to Flims on day three, or sleep in Flims and bus to Laax on day one: either way each end costs one bus ride. Beginners should swap day two for easy runs at Foppa and Spalegna, because the glacier and its black run aren't first-week terrain. If you'd rather ski the other two big Graubünden names, see 5 days in Davos and Klosters and 5 days in St. Moritz, and for the country, see Switzerland.