600 metres ,,,1800 ft approx,,,,,,,that's a lot of runway,,,,even with half a bit lumpy ,I'm not saying anyone should go in to anywhere they're not comfy with ,but with a bit of practice 600m is plenty for just about any of our lighties. It comes down to getting in tune with your plane, it's nice to have 3km of bitumen in front of you but it can be restrictive if you never learn to short field it confidently , and as a side ,when the fan stops if your current at getting it in tight your survivable paddocks suddenly become a lot more numerous,
Matty