Make chunks all the time, I separate the cherry from the rest of the firewood and cut and split to size, If I don't have any cherry, I use whatever I have, Maple, oak, Hickory sticks, Mulberry, pretty much any hardwood works fine, being relatively lazy, my chunks are large, like fist size and larger.
Your not getting enough smoke flavor in the WSM cause your not using enough wood. I know a lot, maybe even most guys recommend 2 -4 small chunks per smoke, but that's not enough if you want a stronger smoke profile and a better smoke ring.
Try putting the dampish meat on cold, 4-6 big chunks, and use the water pan, with at least enough hot water to last 2-3 hours. Last smoke I did was with bagged small Hickory chunks the kids brought over, It also worked fine, just used a bunch of it.