Conflicting advice. HELP!

[nazanova]

Hey everybody I'm in a bit of a pickle. So I'm due to get my corn snake by next week or the week after and I have had a lot of conflicting advice that I thought you guys could help me with. From the research I have done Ive been told that your supposed to feed your baby Corn Snake pinkies every 5 days, should keep them in a smallish vivarium until they are about 6-12 months old and that they should have a hide in both heated and cool sides of the tank & a hide in the middle of the vivarium that covers both heated side and cool side. But today I went into the pet store and the worker there told me that she feeds her Corn Snakes every 3 days and sometimes she feeds them more then one mouse, that one of her Corn Snakes is 6 ft but lives in a 4ft long vivarium and that they don't need a lot of hides just one in the cool area and abit of artificial plants so I really don't know what to think now? Especially when it comes to the feeding because I read that Corn Snakes are prone to obesity. Help?