It is an imprecise out of balance that occurs because of all that you've listed. The fix is to dry your tobacco to crispy, smoke slower, inside with the heat on, and never buy bent pipes, and then crush the damned pipe under the heal of your boot.
We've discussed this one to death over the years. I know you're new, so forgive me. But we have had more pseudo-scientific drivel splat our shoes over this topic than any other. Yes, dry tobacco helps, but water is the natural by product of all combustion. Bent pipes, like coiled tubing in an air conditioner compressor, creates turbulence and condenses the moisture out of the smoke inside the pipe. Sure, not all bent pipes do this, but look inside of a Danish high end bent pipe, and they do not drill dead center, dead bottom. They always leave somewhere for the drip of water to flow to, thus eliminating that snotty suck nose sound of a gurgle. Dead center, dead bottom drilling on a bent is just asking for a congestive wheeze of a smoke.
also, smoke slower. That's just a given, everyone should always smoke slower, all of the time.
Packing, eh... I think newbies worry more about that. Maybe, maybe not. I think all of the above has more of an impact on the gurgs.