I'm on the same journey (just got my doyle's hoist and have a fleece bag for it from Dano on the way). I haven't read all the replies yet which I will as I sip my coffee. I will mostly pull my bow with this. When I tree stand hunt, I might also pull a pack (add 10 pounds or so).
My ideas so far are: 1. mini black diamond carabiner.....these are not climb rated but are very strong and you aren't breaking them, down side is they are aluminum and loud (have wire gate), 2. plastic carabiner from Dano, probably not as strong as the metal black diamond carabiners but quieter and probably strong enough, and 3. Nite ize S-biner ( of the appropriate size, probably a mediumish one)....these are similar to the plastic carabiner but probably not as strong.
Here's a way to incorporate these options with knots that will make it stronger and quieter.
Go a foot or so away from end end of the line and tie a loop in line but leave the rest of the line as a long tag end. Tie another loop in the very end of the tap end, so you have two knotted loops 6 or so inches apart. Attach the clip/carabiner to the top loop. When you want to connect, snake the tag end through the gear to hoist and then attach its loop to the carabiner/clip (so you now have a large loop held together with the clip). This way, the carabiner/clip never touches gear to make a noise. Also, it makes the setup twice as strong. Let's say your gear to haul is 10 lbs. 5 lbs goes to the side of the line that is a straight shot of cord (except inline loop knot) and the other 5 goes to the side with the clip, so your clip sees half the weight.