When I fed outside the enclosure, I would
1. Remove snake from tank.
2. Place in feed tank/tub.
3. Pre-scent for 30-45 minutes (if I need to)
4. Feed
5. Remove snake.
Now that I feed in the enclosures.
1. Pre-Scent
2. Feed
While it doesn't really matter, IMO. Feeding inside the enclosure is way easier for everyone! (You and your pets)