A lot of variables come into play here.

How many snakes you have?
What types of snakes you have?

Those are just 2. My anaconda I feed in a seperate enclosure, not for any particular reason but I just want her to never know her enclosure as getting food.

My Rufous beaked snake I don't feed in a seperate enclosure, he eats in his tank.

If I had a venomous snake? It would eat in its cage.

If I had a BP, it would probably eat in a seperate enclosure.