No pine near me, can't recall ever seeing any here in Thailand.
I have a big sawmill 3 minutes down the street and they have done work for me so I know the Manager.
I asked him for wood shavings, he asked, how much do you want...........ohhhhh just a 5 gallon bucket, he told me I can bring a dump truck.......for FREE.
I took a gunny sack and filled it half way.
It works great.
I start with news paper, once that gets going, put in 2 handfuls of shavings and stoke that up, then put in a few balls of rolled up unlit newspaper to act as my cooling filter, so smoke is cool and not blowing any embers.
For you guys that make your own boxes.........try shavings and sawdust.