When I first put my GP outside, he hid, because he wasn't used to it. But I put folding outdoor chairs along the sides of his run, cause they block the view and it makes him feel abit more secure, and of course sitting next to the run talking to him or even just being there, he gets confident and walks around, and now he will stomp about the run even if there are no chairs up and if I am not there (though I prefer to have some chairs there just in case). I think also put him out gradually, like an hour a day, then two hours, then three etc, so he wouldn't get too exhausted by the experience. I never bothered putting a toilet out as his pee and turds fertilize the lawn. I don't think dog pee is a problem, it dries off in the sun and gets diluted at night by the dew and if it rains at all. I have never heard of any urine being toxic unless in huge quantities or if its infected with disease.