Would you suggest bringing your own firewood? Or is there enough deadfall/driftwood to work with?

Yes bring your own. Burning driftwood is actual against the law in WA. Burning wood from the forest is legal but there isn't a bunch laying around

There is plenty of good dry wood available to buy at the shell gas station right before you turn off hwy 2 towards the campground.

Definitely byow👍it is available all over locally but a little more expensive