For sure feed in the cage.
It was always silly to me thinking about feeding outside the cage. I have two snakes over 6ft. One is my BRB and the other is my 40lb Blood. Can you imagine trying to move those two into a feeding area? Good luck!
Even my small guys like my GTP would be a nightmare. At night he bites everything. Trying to get him out and moved to a feeding area would leave me very bloody.
Though all my snakes regularly hammer their food none of them show any signs of aggression when I'm cleaning or handling them during non feeding times.
You are less likely to cause stress to the snake and greatly reduce the risk of getting tagged which is both good for you and the snake.
The only reason to feed outside of the cage is if you're feeding live. If you're doing that you should never leave the snake alone with a rodent. If you don't know why Google pictures of rat chewed snakes.