I use a three piece easy hanger with a sturdy window clamp on the end. No junky $20 window clamps. I have gone through three of them.

When you first buy the easy hanger it will pry squeak when you screw it into the tree... So i just heated the treads up with the torch and screwed it into the tree. It took there squeaky loud paint right off and now it works great... It can fold up and be very compact. One bungee strap and you wont even know its on your tree stand on your back.