If you want the maple taste while not increasing the sweetness of the brine, I use maple extract. The extract fools the nose into tasting maple. Perception is reality. Nothing I have found yet works too well. Disco I understand, had some good luck when he tried injecting the maple syrup vice adding to a brine, or coating before the smoke.
Chef JJ my freight is a bit higher to here but I also get 2 each 1/2 gal jugs, one of grade B and one of the light amber. I cook with Grade B, I eat the light amber. I don't tell anyone here of my maple syrup fancy, I do live in the middle of sugar cane country. At least I like the rice chexs best......LOL