doors on custom enclosure

[duroo]

i want to build a custom enclosure for my boa and one for my ball. i have heard that some people have two doors on some enclosures, one for feeding and one for handling,cleaning,etc. i assume this is so the snake will only expect food from the food door and wont ususally bite if you reach in from the other door. is this a good method to use? or should i just feed my snakes in an altogether different tank as i have been doing? or does it really matter?