I don’t use this method but have read a bit on it. Depending on the height you climb at you may want to consider a longer rope. I think some guys are carrying 50’+. If you think about it if you want to get 25’ in the air you will need extra for knots, the diameter of the tree, also your height will add in length since you would be 25’ at stand height. Just a thought. I also believe 550 would work but dynaglide would be nice because it doesn’t knot as easily. Regarding the type of rope unfortunately I do not know what is best. I have seen people use Ropeman ascenders for their tethers but have also seen good reasons not to use them on your tether (YouTube video from the NY Saddle Hunter). I personally use the ropeman on my linesman’s belt and a prusik on my tether and do not have problems, although the Ropeman would be nice because they are so easy to use. For your bridge I think they are using a full bury 1/4” amsteel but may want to research more into that. I’m in Wisconsin and find it very difficult on public land to find a tree that is skinny to hunt out of, I have found that my linesman belt is too short and causes troubles when climbing wide trees so I’d recommend making your linesman belt long and cutting it down in the future if you find you do not use it. Good luck!