I either use sticks or better yet...ladder stands.
Faster, safer, comfortable, easy to set.
Of course if it isn't your land, you may have to use hang-ons, but then I would use the climbing sticks. Why damage the tree, by drilling or the use of screw-in steps? If you forget to remove just one screw-in, you are going to ruin some loggers day,eventually.
I also remember a friend of mine slipping while climbing. He didn't fall, but speared himself with a step thru his lung. bled like mad and almost died.
I wouldn't use screw-ins or bolts nowdays...thing of the past. too many negatives.
You might be tougher than I am, so suit yourself.
Just my opinion.