That second picture is AWESOME, wish I lived out there to ride that snow on my Shaggy Ahmeeks (fat body skis). I have never owned chains (this is my first 4wd vehicle) but when I got my Tahoe, the first winter was a blast. Couple times we got hit with 14" of snow in Detroit proper, I was plowing through any and everything. Started fine on a morning when it was -23*, and this winter has been a lot more about ICE than snow here outside of Detroit. The ICE is the one downfall of a big, heavy truck.....you just have to drive slow cause inertia is a ***** lol.
For standard ALL SEASON tires, I've been told by tire people that it actually is better to leave the tires fully inflated, rather than the old trick of dropping 5lb of PSI out of the tires. That way their is no catch of damaging the tire, plus the much lower gas mileage.
Either way, I have been PLEASANTLY excited and surprised at the capability of these big trucks!! I have yet to get it stuck.