Cat-mergency

Jay the feral cat is ill...I think his leg is either broken, sprained, or he stepped on something. He is hopping and not using his front right leg.

He won't let me near him under the best of circumstances.

I need to catch him in a trap and take him to the vet, right?

Then what? Does a feral with a cast have a chance? Does he live inside at night (whether he likes it or not)? Would I put him in a crate?