Loc: Orange County, CA, USA
Yes, you read that correctly, 100% propane for backpacking type stoves.
The ideal set up is the 226g/8oz 100% propane Bernzomatic PowerCell -- if you can find them. They're out there, but they're tough to find.
Absent a PowerCell, you can use an adapter like the Kovea LPG (propane) adapter with common 16.4oz/465g propane cylinders, the kind everyone uses for car camping.
What are the considerations involved with the use of such an adapter and 100% propane for backpacking stoves? I address these and other practical matters of propane for backpacking stoves in my latest blog post: 100% Propane For Backpacking Stoves.