Three things that will help you out......
Rope Bag.
Rope Bag.
Rope Bag.
I used to coil. Takes time and it does not play out well. In two words, "it sucks".
You are best to get the soft bags. They are better than the hard bottom, or the ones that have the coil spring on the sides. The nice thing with the soft bags is that they conform to any shape when you have to throw them in the truck or underbody box.
I have used rope bags on rope lenghts up to 1200 feet. (actually we used hockey bags) as the rope was sooooooo long.
The rope boss bags from Sherrill are nice, but don't pack as nice. However, on my 600' ropes, I do like their "back pack" rope boss bags. I bought them when they had a sale.
The cheap bags from Baileys are alright, but the stitching that runs around the draw string comes apart easily. Best to have the wife run a couple of extra stitches around them with the sewing machine.
I've found a local (Ontario) supplier of equipment. They have a good selection of arborist equipment at a decent price. Give me a PM if you want their name and number. I've recently started purchasing my bags from them.