Muddy, you are probably going to want to get 4 sticks. Three will be about 15' to the top of the last stick, but then you have to hang your stand about 2' or 3' lower in order to have a hand hold to get in and out of the stand. Last year I used 5 sticks on one tree and I would guess that got me about 20' with a stick at the top to climb on with.
I love the LW sticks, I have eight of them so far and am buying six more before fall, just too bad they aren't cheaper. It runs about $160 worth of sticks to get me the height I like, but it sure beats the heck out of those dang screw-ins.
Pretty sure the sticks are 32" long each, and the ability to flip flop the steps from side to side is great.
Also, those camo bags that the cheap folding lawn chairs (Wally World) come in work great for hauling the sticks around.