Kettlebells and renegade rows - back exercise

Ok, it was only a 6 pointer, but I will never forget the cold Nov. afternoon in which I stood motionless in my stand for 3 full hours with my shoulders slightly hunched against the chill and rain. A nice 6 point walked in and stood and began browsing unconcernedly in the middle of my shooting lane. I was using a compound bow at the time and started to draw back. My muscles were so weak from being in one position for 3 hours that I could not pull the 60 lbs. The buck even stayed right where he was while I did the weak archer's dance and tried to pull the bow pointed down, pointed up, leaning my bow arm elbow against the tree, etc. When I finally got the bow drawn, the buck casually sauntered out of my shooting lane and out of sight forever.

Since then I've worked my back muscles extra hard on the weights before bow season but have never found anything that precisely replicates the muscles used in the draw. Those rubber hose things come close but don't feel right and seem too easy anyway. But I just started doing kettlebell workouts (think of cannonballs with a single handle) and have been working on renegade rows (e.g., https://www.youtube.com/watch?v=Ggaj8hB0BUY). You can do these with dumbbells too. The row only goes to the shoulder, not to the nock point on your face, but the back tension feels similar to archery.

Any other suggestions?