I've always wondered what would happen with rolling a tractor. I'm trying to avoid it. Most likely if I go over, it will be in the middle of a blackberry patch.
Post some photos of the right side of the tractor when you get a chance.
I'm glad you're making progress. Keep a few straps on the uphill side of the tractor until you get it in the clear.
I'd probably strap the 3 point hitch and rear blade to the ROPS to lift it up enough that it won't get in the way. You may find something to strap the bucket to, or you may be able to simply drag the tractor backward.
I haven't tried to steer my tractor much without power. I have a self propelled baler that has zero steering without power. If pulling your tractor backward, the wheels will probably follow fairly well. You can manually push on the wheels to steer, or use a strap to turn them. Or, perhaps a strap to the steering knuckle to keep the wheels turned while you pull it straight.
I have a Harbor Freight 12,000 lb APEX Synthetic line winch that so far has been doing well for me. I made a 1 1/2" custom receiver mount for my trailer attached to a large piece of channel that I made into a winch mount. I also made a couple of D loops on the back of the channel that gives me a good tie down to use the winch in portable mode, tied to trees or vehicles.
I had an earlier 12K ZXR winch that died at a most inopportune moment. So far the 12K APEX is doing well.