They'll eat the hound out of it on santee cooper at times ,ol' southern boys use it quite a bit.I've used it a little but you have to buy it at a market here and it's a little pricey,i guess it's because alot of folk eat it,......not me pal. try it ,you may get surprised
I've never used mullet for catfish, but everything else I've ever used works.... even fried chicken skin... fried chicken livers, heart, gizzards, shad, perch... the list goes on and on. I don't see why mullet won't work, especially if it's a little bloody.
You can't beat a big 1 pound mullet filleted and fried golden brown. Don't knock it till you try it.
As far as bait goes for the jugs, anything that stinks and will stay on a hook. I have found stinkbait/dipbait disolves too easy. I have always had good luck with LARGE minnows, preferably the biggest minnows you can get, or even small pond perch. But just can't beat a good skipjack head. or even the body.
I think fresh shad is the best bait for big blues. I throw a cast net to catch them and rig my jugs with them whole or cut. Sit back and wait for my jugs to flag and take off. Nothing like chasing my jug and pulling up a big blue.
I feel very confident that cut mullet would work well for blues and channels. I think that they would need to be fresh or brined/salted for best results. Mullet does not freeze very well. For those close to the coast---they are readily available. After freezing, mullet becomes soggy.