I lived in Crested Butte Colorado for 5 years and often traveled Monarch, Red Mountain, Lizard head, and Mcleur Passes with these
http://www.scc-chain.com/Traction Pages/Trac_QGHD.html without a problem.
I had 4x4 and would normally put them on the front tires so steering was always under control. For me traction going up was never an issue but being under control when going back down was what concerned me. Also, your front tires plow your trail so as long as those were moving I was fine.
Now, Depending on where you are going you can determine which passes you could potentially have problems with. Some passes like Red Mountain in the San Juans are notoriously bad. While passes like Monarch I only had to chain up once in 5 years. Normally just 4x4 on non commercial vehicle was adequate.
I would practice putting them on before you go so you can get familiar with the brand that you buy. Much easier to figure them out on dry ground when it is 60 degrees out rather than 5 degrees in the middle of a blizzard. Normally, you will want additional tightners. In my opinion you can't have them too tight and the last thing you want is a clasp coming un-done and thrashing your truck.
Have fun. We are heading to Crested Butte to go Skiing for the week of Christmas can't wait.
Lastly, If you don't want to order them most auto parts stores in Colorado should have them in stock.
