Has anyone here chained up there bus to go into snow or ice conditions?

[Urnie-Medie]

Hopefully someone can help guide me.
I will be going to the Denver area in December. Going west on hwy 285.
I think they require chains in certain conditions. Could someone please answer some of my questions:
1- If needed do you put chains on both of the drive wheels?
2- How should the 2001 LXi handle the snow without chains?
3-Where is the best place to get chains?
4- How hard are they to put on?

Any other advice will be greatly appreciated.

Thanks
Urnie