If you are immune to unpredictable, marginal weather, an outdoor location is OK if you don't want strangers entering your home.
The GH experience is anonymous for the giver, and the receiver - a cock only, no face, no deeper visual connection to the giver and receiver.
In the cuckold sense, the husband's view of the wife, as she gives, is of importance. She should make eye-contact with her cuck, throughout the experience.
A pair of chairs, or a chair and some padded surface, like a cushion are useful to make the giving participants comfortable. The giver's side can also benefit from low light, like a garden lamp.
The GH slot should be big enough to allow the receiver's entire cock and balls to pass through without obstruction, and allow for men with different heights. Not too large, to reduce visual contact.
Of course you'll have to sort out the neighbors and passers by... If you can enclose the area to restrict the view (and some of the noise), you might succeed.
