I have an Atlas plate, and like WmSmith I run it up for holeshot if I have a heavy load, and I tweak it on the fly when I run a go-fast prop, but I don't really change anything in rough water since it's usually low anyway.
I would try a Fury before you buy the Tempest. Fury is a very good prop.
I've been on Rayburn a couple of times when it was somewhat rough, and my normal set-up handled it fine. I'm not in a hurry on any lake when it gets rough.
Real trucks don't need spark plugs.