Shoot!!!
If I was home I could send you more black canes than you know what to do with. That wild blackberry out here in the PNW is a royal pain in the rear. Grows over everything. Leave you car parked near a fence and next thing you know you can't find it because it's under a black berry bush. Don't trim the property for a year and you're 20x40 shed will be fully enveloped in black berries covering the whole dang thing. Worst thing is a single bird dropping will start a new plant! Then, if you butcher up the vines, you'll have a new one from every sliver on the ground! The cities out here have even hired goat crews to go in and eat up the bushes on the medians in highways and freeways it's so bad!
Of course.. maybe the wild black berries out here isn't what you want.
Hate it 11 months out of the year, they are only good for that lovely 100lb harvest of purple goodness in Sept.
Good luck!