Taking the pictures is easy, i just put the camera up the cage. They are very large dog sized cages. I do not think you could catch one with a smaller cat/raccoon sized trap.
Big dog live traps work just fine. I have caught these three over the last 18 months. Use a fresh dead poultry body as bait. If i have a death, that is what i do with it. Make sure to tie the leg of the bait to the bottom of the trap, so the fox cant just lean over the pedal, take it, and walk...