Big Paws Only Dog Forums

I'm very new to the big dog world (well, the dog world at all), and need some advice about grooming for my German Wirehair.  He's just a puppy, so he's very busy and ALWAYS dirty. I've been reading up on grooming for this breed, and most sites and books say to avoid bathing them too often, because their hair is water resistant (this is fine by me: he's had one bath, and I think it was more traumatic for me than him).  But, he is beginning to stink, and it is starting to get very warm.  I guess I'm just wondering if it ok to shave him this spring, or if that would mean his hair would grow back less water-resistant.  Does anyone have any suggestions?