The advantage of a drone is they are a absolute doddle to operate. I have alot of RC experience and drones are a cake walk compared to stick flying fixed wing and heli. There incredibly dangerous really as the tech does all the flying and thus alot of numpties own them. This becomes a problem when the tech fails of course
Theres minimal risk to you as oppose to a boat and rough weather within reason is fine too. I'd happily send a good quality drone up in 35mph/ 40mph winds. But I am experienced enough to land it manually every time over GPS so wind won't skew landing.
Some people add some line with a clip in the middle at the drone bottom that will release the line with merely the bail arm been brought over.
The more savvy approach is to repurpose one of the servo inputs on the drone so say gimbal tilt left right becomes open servo and close for release hook. This isn't a issue as your gimbal still tilts up and down and the drone can pan side to side with the rotors for you. This means you can in effect Hunt shoals of fish in clearly conditions with the camera and drop into them. I've seen it done with Tuna in the USA.
If you've got the cash to play with it's a serious fun toy/ tool for fishing. Some DJI drones even have conversion kits now on eBay for peanuts. Mavic range I believe. If I'd had one the past few days I would of been out 250-275 yards and past the breakers nicely.
There is also other considerations like drone registration, rules in public, insurance etc. But your not flying commercially so for example if tidal grounds you have permission from her majesty as she owned that area. Landowners permission and your fine too.
I really wish I had some more cash spare as it's such a cool toy haha. If anyone interested drop me and pm and I'd be more than happy to offer advice.