I have never used the roll up sleds, but have seen guys used them and swear by them when you talk with them. I have used a jet sled to haul firewood out of the woods on snow and on dry leaves. It works very well and I wouldn't hesitate to dry using the jet sled with a deer.
Hunting most all public in PA in the NC part of the state, I usually take the first legal deer I see. Time is usually limited and the deer density is pretty low.
My 243 shot 100gr balls well enough for deer hunting, but i wanted to be able to use it for groundhogs so i worked up a load for Hornady 58gr V-max. It is a shooter with that load.