Advice for hide size and heat tape width.

I am grabbing the last odds and ends for my first tub set up for my first snake. I am looking at BP that are all from 225g and smaller. I chose a 15 qt sterilite tub to start. What would the appropriate hide size be for a snake of that weight in a tub of this size? I am looking at the hides from reptile basics. Also, in such a small tub, do I need both a cool and warm hide? And then lastly I have decided to order my heat tape from reptile basics, and again, with a 15 qt tub, is the 4" wide heat tape adequate, or would the 6" be better? Any and all help is much appreciated!