Nothing is written in stone in the reptile world.

I've had kenyans produce the last 4 or 5 years and only one of those years did I seperate the males from the females at all.

I keep one male and two to three females in each cage, in three to five inches of sand with an overhead heat source.

They have been breeding like crazy the last three weeks. I should have babies towards the end of July.

Do what you like and see how it works. If it's not working, change things. Experiment a little. As long as they're warm and fed and have water, the snakes will be fine whether kept alone or in small groups.