Ron, its great you put some good thought into your feeding stratedy but I think you are setting yourself up for some difficult problems in the future. I am also curiouse...have you raised any green anacondas from birth? Most are often so shy they will not be likely to feed after being moved in the first place.
A huge snake is not only difficult to move and dangerous to move around after feeding...it is extremely hard on them. Cleaning up after a few regurgitations from a big python or anaconda will likely change your mind on feeding technique.
As far as hooks, what people are refering to is "hook training" by setting a hook on the snake before moving it out of the cage in hopes it grows conditioned to know it is not getting food. A good friend of mine does this with his larger retics and it works quite well for him. I usualy will just move the snake (while keeping my hands from its head) a bit and wait a minute for it to prepare for being moved. I do this with my own snakes and have done it with snakes who have been approached under this method at a facility which keeps quite a few large constrictors for educational use. This has worked well.
Going in any enclosure without giving a snake a chance to realize what is going on is an easy way to get bit on not only feeding response reactions but deffense reactions from startling.
I will also say it is not really the number of years you have been working with snakes, rather what you have learned from it. There are people who have been keeping snakes for a long time and are not extremely knowledgable or rational on the subject. Keep your mind open and read up on as many practices and findings as you can.
I will also note I have been bitten by snakes outside the cage which are fed inside the cage. I can think of quite a few bites which were certainly feeding response bites. Pay attention to what your hands are doing and what it might look like they are doing to a snake. Ball pythons seem to be the worst with this lol.