R.I.P. Scout26
Definitely get the pruners, get one with aluminum handles. Blackberries are a pain to cut with a machete- they are springy, grow in all sorts of directions so it hard to get a good angle cut on them with a knife edge, and you can grab the bastards with the pruners. Way less energy expended.
Make sure you bring a knife and fork with you. That way you can eat anything you kill there, 'cause it sure sounds like getting a deer out is going to be a cast-iron female dog.
Kinda hard to bring the latter on the kayak