He's gorgeous!! Why don't you see if your shelter has a trap/spay release program? If they do it would be great - they will neuter & do rabies shots. It's a Win Win situation. The cats don't reproduce, and the males tame way down after neutering.
Here's one of my ferals - Fuzzy and his son Little Fuzz. Fuzzy had been neutered and he's been taming down a lot. Little Fuzz so far has managed to avoid capture - but we haven't given up.
Dallas, Houston & Peanut the Prairie Dogs
Gypsy & Amber the Satos
Apache, Amigo, Max, and Morgan the Kitties
Scooter, Annie, Buttercup & Squeaky the Guinea Pigs
Mocha & Latte the Rat A Tats