I am from Prague, Czechoslovakia Europe and therefore am unfamiliar with lake tahoe. I am hiring from one of the large car rental companies a Jeep Grand Cherokee in Reno for travel 16-25 January 08 to the ski resorts around the lake. The renter says the tyres are 'all weather' (not snow tyres and no studs) and they offer chains. Does one need chains? There is a free shuttle from red wolf lodge on the lake, but as it returns at 4.30pm, that stops night skiing at Squaw Valley. PS Red Wolf haven't replied to emails ; - their only email address isfor some guy in sth los angelese. any suggestions are greatly appreciated.