DougE wrote:
Worst case - Don't think I'd want to carry jumper cables that would have to be over 20' long as I wouldn't want to try and load a car on the trailer without it being hooked up to the tow vehicle hitch.
20' of jumper cables isn't any real hassle and will deliver 100% reliable power since you can start your vehicle, connect the cables and winch away all day long.
I would still keep a battery at your winch but have the 20' cables stored away for those just in case moments.
How I do this is I put a nice utility tongue box on my flatbed trailer tongue, the box is big enough to fit my winch battery, plus blocking plus straps and tiedowns, fire extinguisher a few tools and have space leftover for jumper cables. They make some very nice tongue boxes which have angled shape of the trailer tongue and typically there is space between the tongue jack and the trailer body.
Looks like this..
![](https://m.media-amazon.com/images/I/915dyL7J3WS._SL1500_.jpg)
I mounted the winch behind the box using a 2" hitch receiver so I can remove the winch if needed.