I could be wrong but I believe most folks think of BBQ'ing as smoking the meat. Truth is smoke is a by product of the open flame but indirect heat used to BBQ meat.
Here are a couple of photos of BBQ pits to illustrate what I'm talking about:
This is the best style for a working pit. Fire box at one end, chimney at the other and a metal top. Truth is there is no need for the lid on the firebox or even a box. I've seen pits at some of the best BBQ joints in Texas with no box at the fire end, just a opening with a pile of coals under it and a stick or two leaning over the coals with one end in the opening. Once you have your bed of coals it takes very little wood to keep the pit on temperature. BTW, the "draw" can be really strong.
The Salt Lick pit just outside Austin in Driftwood, Texas:
As you can see no traditional pit just open flame but indirect. Not my favorite pit but it works, the Salt Lick is one of the top rated BBQ joints in Texas.
With a Pipe pit with firebox like my current pit the BBQ'ing is done with the firebox lid open so the cooking area is heated with an open flame and not smoked. If you want to smoke it just takes closing the lid.
Some folks like "smoked BBQ", I much prefer a less "smokey" BBQ that comes from an open flame.
Any Texas Pit Master will tell you good BBQ needs no sauce, sauce is to cover up poorly cooked meat. Then at the same time they each have their own "secret" BBQ sauce. I'm guilty as charged, my excuse is the sauce is for the sausage.
ken