We live on a farm, way up a mile long lane.
I feel it is safe. There is only one house near us & that belongs to dh's uncles & aunt.
Outside my kids have swings, slide, trampoline, play house, bikes, ride on tractors, moby cars etc.. they have great fun & I can watch from the kitchen window or the french doors.
Ds is 2 & half & he loves to play outside, he tries to go out in his jammies on the morning & I have to stop him!
Dd sometimes plays outside, she prefers to play camogie against the wall of the barn, so quite often, although I can't see her, I can hear the ball banging off the side of the barn wall!
I had loads of freedom when growing up & I think it's important for my children that tey can roam as free & still be as safe as possible.