I would say that it depends on how easily she can be lured back in or come when called. If you can feel confident that she would be able to be rounded up to return to the house, I say go for it.

I do not have a safe area, so I would never drean of it.

My parents, on the other hand, allowed the cat out at will and back in on command. That was a bit too lenient for my taste, but it worked for 14 years. They had a good amount of property on a not so busy road, but it was not fenced.

Good luck with whatever you decide, and welcome back!