For some unlucky reason all but two of my sits this year were in red pine. The trick is to lightly scrape the bark where your tether goes. For my feet I do everything I can to not touch them on the tree. The only thing that really really bothers me is my linemens belt. Not so bad if you risk it to climb without it, but hooking it up to attach the teather is no fun.
Not a tree, but one thing I try to avoid is large thorn/pricker bushes when going mobile. No quiet easy way to deal with them. Plus they are magnets to any kind of quiet bow hunting clothes.