I don't use my drums much anymore, but back when I did, I always loaded film wet into the water-filled 3000 series drums for precisely the reason you mentioned, Loose Gravel. It saves you the bother of having to dry out your drum between runs. I did this a lot with a 3005 drum for 8x10 and a few times with a 3010 drum for 4x5.
I've mentioned it on photo.net a number of times, too. Many people have told me how ill-advised they think it is. I've never had a mishap, however, so I'm convinced the nay-sayers are simply constrained by some sort of deep-seated photo-taboo that I never learned, and am therefore not personally constrained by.
I unload my film holders into an open film box. Then I pick up a sheet from the stack with my left hand, transfer it to my right hand, and push it down into a water-filled tray. I brush my right hand against a towel stuck through my belt just to get the excess water off, but my hand remains damp. As I pass each film from left hand to right, I touch only the extreme edge before putting it in the tray of water. Once I have as many in the water as my drum will hold, I transfer them one by one from the water tray to the water-filled drum tube. I put the lid on and finish the pre-soak in the drum.
I've never had a scratch or any emulsion damage by doing this. Don't let anyone tell you it's a bad idea to load your drum wet. All it takes is simple reasonable care, and it's less bother than having to dry your drum between uses.