I dip Copenhagen too. Been tryin to quit for years, maybe once my grad school stuff is over with. Only a few more weeks. Have quit successfully a few times for 6 months at a time, usually something really stressful happens and I'm back to it.
Been dippin since I was almost 16, so that's been about 9yrs. Only spit for the first 3yrs. Man up and swallow. My father told me it's more polite that way. Even thought it's alot to stomach at first, you stop salivating after a few minutes. If you spit, your body produces more saliva.
Funny, I used to make fun of dippers in my undergrad classes, for carrying their "baby bottles" around with them everywhere. It's a filthy habit.
As far as smoking a pipe, I've gotten the urge to spit. I have a pipe that seems to make me drool alot. It's kinda heavy, and I heard that clenching makes you drool more. I keep a few pipe cleaners with me, shove them down towards the bowl to soak up the juice. And I just man up and swallow whatever I got.
I've tried softy bits to reduce the amount I have to clench, but it just seems to make me drool more. As a result, that pipe has become my "sit down, relax, and enjoy" pipe. I keep the lighter ones for smoking when I'm out and about.