I have an 8 y/o unneutered male GWP. To date, he has not experienced any health problems nor has he exhibited any negative behavior problems that can be associated with his "intactness" (note--you can see neutered dogs humping each other).
Since virtually everyone I come across spays their bitches, there has never been an issue with him running off to find romance (deer were another issue).
I can't imagine that a hunter would be nutty enough to hunt a female in heat, especially on public land.
Not being a breeder, I would always spay a female, purely as a matter of convenience.
