Motor mover or not.....

Hallo. We've just bought our first ever caravan, a Swift Challenger 480 (single axle, twin-berth), and are facing the prospect of bringing it home as soon as the towbar is fitted to the car (BMW X3). We have space to store it OK, its just how we get the van into it, as there's not enough space to reverse it in while hooked up, so it means we will have to unhitch on a 1 in 15 slope, spin around through 180 degrees and run it 6-7 metres down the slope onto the flat apron that it will sit on.

I think we should be OK getting it out as there is just about room enough to hook it up to the car.

The van is just over 1000kg - is that sort of manoeuvre on that slope do-able by a couple of able bodied people, or should I invest in a motor mover? Bit worried by the "on or off" handbrake as it means I can't control the rate of descent. The thoughts of you experienced people would be gratefully received.

Thanks