Matt,
I have used a Coleman "Black Cat" catalytic propane heater in my older buses.  Seems to do pretty well.  I even updated to the "Power Cat" model that includes a battery-driven fan to blow the heat.  Got it for about $70 at the local Bass Pro Shop.  Actually gives off decent heat, they say it is completely safe for indoor use, however, it does create a lot of condensation inside the bus on cold nights, so you still need to crack a window unless you don't mind the moisture.
peace, John Baker

On Thu, 20 Sep 2001 14:20:52 -0600 Matt Heydon <matt@CO.ROUTT.CO.US> wrote:

List members:
I will be doing some cold weather travel and I'm looking for a safe way to
heat the interior while sleeping.
I've been to MrHeater.com, but they say their stuff is for outdoor use.
I've been to Colemans site and there are a lot of choices.
What are people using that has passed the Vanagon owners test?
Gratefully,
Matt

Peace, JB
'66 Split Window Camper
'83 H20 Vanagon

"You cannot simultaneously work for peace and prepare for war..."