This thread reminds me that the big ol pine tree in my backyard is patiently waiting for me to come out and collect some more pine pitch. It takes a flame really well, helps the tinder and kindling get going, and a small film canister full weighs next to nothing and takes up very little space.
Bacpacjac is on the right track. Tree pitch makes for a very hot burning fire starter. In my area of the world, there is certainly no shortage of it anywhere, anytime of year.
In cold wet weather, which is currently typical, I have more faith in pitch then many other more modern materials. A film canister of pitch will last for many fires even under the most demanding weather conditions and is easy to replenish without a trip to a store or having to re-purchase from an internet site...
The pics were taken in last, mid summer.