I would choose a light weight hang-on and a set of screw in steps or climbing sticks. A hang on can be just as portable as a climber with some backpack straps and portable stics. It will also go up a lot more trees.
Difference is.....I'll be sitting in my Viper, hunting....while you're sweating and still hanging that stand. I've done both. I'll take the climber if I have to choose. WAY, WAYYYY more versatile.