What size drone are you planning to use?
What size weight are you looking to take out?
First check how much your drone can easily lift,bearing in mind it will 9\10 battle some sort of wind.
I used a normal sliding rig for edibles.
My boss uses his normal shark trace with a sliding 8oz right at the back,so when you hang your rig its held by the weight and not your bait,works out to be more stable than clipping your bait in.
Anything from mackerel to half a yellowtail,again depending on what kind of weight your drone can lift comfortably.
Before you go try all this,do try out your whole system on a big field and perfect the dropping of your baits and flight controls.
Trial runs are a must