You should also consider using synthetic oil. It stays pour-able, or liquidy, in cold temperatures. Dino oil will get thick like molasses and synthetic will still pour freely. Synthetic makes for easier starting and better lubrication in cold weather. Put a oil pan magnet on with synthetic and the oil in the pan will be very 'pourable'. Look here:
http://www.vwtrendsweb.com/tech/0304vwt_synthetic_oils/index.html
Also consider a battery warmer for cold climates. Cold really affects battery output. Battery output vs temp (check the graph a few inches down):
http://www.speedace.info/car_batteries.htm
One type of battery warmer:
http://www.padheaters.com/battery_heater.html
This type is not as common as the blanket style.
Another style, known as battery blanket:
http://www.jcwhitney.com/autoparts/Product/tf-Browse/s-10101/Pr-p_Product.CATENTRY_ID:2006128/p-2006128/N-111+10201+600000917/c-10101
Available at most auto parts stores.
Block heaters are very good. A bit of a hassle to install (because you must drain the coolant from your block) but work very well. Basically you remove one engine frost plug, and replace it with a frost plug that has a heater element on it. A small extension cord plugs into the frost plug, and you plug this into any normal outdoor household outlet. These block heaters last many years, and usually do not leak. They are just as sturdy and keep a tight seal just like an OEM frost plug. Many cars/trucks in colder climates come with factory installed block heaters of this style.
Note: Frost plug access is usually ALOT easier in a truck than a car, especially on a roomy engine bay like a K5.
Oh yeah, get the larger engine magnet heater. It will do a better job of heating the oil. The magnet is quite strong and should not fall off under normal driving. If going offroading I would take it off and remount it later.