Looks like a good come-along and a solid "plan B." Because the working length of a drum take up puller is limited, you will also need cable or extensions to use to reach from vehicle to anchor point to use in conjunction with the puller, which looks like it might have a pull length of around 6 feet using the block. Don't use dynamic straps for this purpose as you will use up most of the puller's working length taking stretch out of the strap. Winch extensions work well, or some form of rope or cable extension, but it would be well to carry varying lengths because of the limited working length of the puller. Even a good length of high strength logging chain will help in setting up odd length pulls.
Not criticizing, just trying to think ahead.
Also, not that I am a fan of the Black Rat style puller, but I believe it is a windlass style or creeper device that does not spool cable as it goes, so you can set it most anywhere along its cable length and pull away. This would make set up easier, as you would have only one cable to work with, just like a winch. I have not used one, but have watched them in use. They are labor intensive. I am to old at this point to make much use of one for any length of time, especially in high heat, but either device will serve as a usable second line defense.