I have a problem with crooked trees too. My answer has been ladder stands. I bought a cheap one that has a small platform/seat 15' tall and you can only sit. The problem with that is I cannot shoot to my left (RH shooter). I like to stand so my next ladder stand will be a bigger ladder stand, one I can stand up on. Put it up early enough in the season and it never affects the deer at all. Of course this is usually only practical if you own the land, these are not portable stands.
Good luck=======>
Bill