I’ve used Wild Edge steps and a Tethrd predator on trees around 6-8 inches in diameter before. Expect more movement from wind. Other than that, it wasn’t too much different than any other tree. Main problem I have with trees that small is they often lack sufficiently leafy branches for concealment.
Have you considered hunting from the ground? I actually have had a few close encounters by sitting in a ditch so I’m concealed mostly below the ground surface level. If there is not a ditch like that, I’d gather up some branches and build a natural brush blind.
Edit to add:
You mentioned it’s young “timber”. Pines I assume? If that’s the case, the pines we have like that here wouldn’t be suitable to climb at all really. They are 6 inches diameter and get skinny and very brushy as you go up more than 5-6 feet. For those, I would find the trails leading in and out of areas with feed trees or other type of cover/habitat change. Southern Outdoorsman podcast guys talk about this a lot. They love sitting edges of young pine thickets.
Last thing I’d say, is sit on the ground, but be super still. From ground level you can see under the low canopy pretty well.
I guess a more detailed description could help. I forgot there is so many situations that could involve smaller trees, timber, pines, etc.