Hanging spareribs vertically from bacon hooks is a total gamble, and honestly, you are playing a risky game of brisket-bone roulette here! While it is a clever bit of smokehouse geometry that mirrors exactly how the bellies are cured, there is a massive difference between a cold-smoked belly and a rack of ribs aiming for that competition-style bite.
If you are planning to push these for a full 6 hours with absolutely no foil, you are going to be sweating bullets by hour 4. Once that collagen breaks down and the meat starts shrinking back from the bone, gravity is going to become your absolute worst enemy. That "tug" you are hoping for can vanish in a heartbeat.
It is a very smart move that you put those drip pans underneath to catch the casualties, because without a foil wrap to support them, there is a very high probability you will be fishing at least two of those racks out of the grease tray by the end of the day. Good luck, let's see if the hooks hold or if gravity wins this round!