Yeah I go up to snowboard in Tahoe every year too. I haven't taken my model 3 yet, but if you're like me and are selective about powder days, then you'll likely only drive through inclement snow weather (where caltrans require chains on every car) twice or thrice a season at the most.
For the rest of the time, you'll be fine with all-seasons. Grand Touring tires are definitely capable in the snow. You could even look at Vredestein Quatrac Pro, which is a grand touring all season that's even rated as snow tires (can't remember the official stamp it's referred to).
Can't confidently say how much your range will be affected with 9.5" wheels, but based on what I researched, tread width (the part of the tire that makes contact with the road) and the type of compound (grippy versus LRR) are the biggest factors that affect range.