Here's what you should do.

Get a Webasto diesel-fired coolant heater. Then get a triple-bypass fuel/coolant hose setup from greasel.com. The triple-bypass hose uses coolant to heat your fuel lines. It's basically 3 tubes side by side in another tube, for very minimal risk of cross-contamination. That, combined with a tank heater, should allow for fast and easy starts in very cold weather.

-Aaron