Bark is not used in smoking chips. The first thing you would do with your wood is to get rid of the bark. Next is to rent a wood chipper, unless you already have one, and chip the wood.
Are the wood pieces smallish? (under 4" diameter) If so, then a pull type hardware rental machine can handle them. If they are under 2", then a home chipper can do the job. De-barking small branches will be fun.
I've never tried this, so don't know if the bark will come off easier green, or after the branches have had a chance to dry.
Hmmmm... we have hickory trees. I have a 55 gal drum, metal working equipment, and 1/2 a hog coming in sometime this fall... hmmm.... (As Ann comes running with a big stick to beat me with for thinking up another project, until I entice her with hickory smoked bacon...)
Michael
Edit: forgot to mention: after you chip the wood, spread the chips out in the sun to dry. On a tarp is good. When dry, store in a dry place in bags/boxes/cans until ready to use.