Yes I could back down but I think that could be more dangerous than skidding for a meter or two going front ways. Hitting the brakes when reversing could cause the front to lift?

As a fallback situation, I thought about attaching a winch to towbar but that would probably require two persons to operate.

Seems to be such a difficult problem that could have been avoided had front brakes been fitted originally. Can't imagine that would have significantly increased the price.