We can cut dead limbs and sticker branches - but we are not allowed to use anything that cuts/damages the bark of a living tree. I have asked several game wardens about trimming shooting lanes and the correct answer is we cannot. Will some look the other way? probably - but I am not willing to take the chance of being busted for wearing climbing spikes. We actually teach pole climbing here at SAFB for all USAF - I can see their advantage - but a misdemenor and fine is not what I want..... three years ago I stopped 100 yards from my truck in OK, after I left the woods and was walking across a field, I pulled off my flo orange (bow hunt during gun season) to remove my light weight wool jacket... it had warmed up a lot. Anyway two wardens watched me from the road. I put the flo orange vest in my pant pocket and simply failed to put it back on to walk the last 100 yards. Now get this, for hunting in OK during gun season on a archery only unit you only have to wear so much Flo O and a hat will suffice. Here I am walking out with a full vest and toboggan (knit hat) which I removed 100 yards from truck while ditching some layers and yes THEY GAVE ME A TICKET. they both admitted they saw that I was wearing it and had removed it. I asked them both where it says I must wear any orange while walking and they both snickered and said I could fight it if I wanted to. I paid 100 bucks on the spot (they had one fo those credit card things for a cell phone) and we parted ways.
If you damage a tree on public land the fine is steeper and it is a misdemeanor and you have to pay for the worth of the tree damaged. just not worth it.
But the main reason is I think spurs make more noise and there is far more movement then using my stick system. That is my personal experience, I am sure some of you are way better at climbing then I will ever be and can pull it off close to buck bedding..... I don't think I can.