Thought about this some more. If that 1,279 lbs for the loader is from Kubota specs, it's just for the loader mechanism, but does not include any bucket or whatever. Figure a minimum 300 additional pounds if you will be bringing the bucket along, maybe more for a grapple, etc. And if you're not going to use the loader at your destination, why not detach it from the tractor, leave it at home and tow a lighter load?.
Just my 2 cents: Better/safer to use a tow vehicle and trailer setup that is not on the edge of being maxed out by what you need to carry, particularly for a long trip.