whitesides don't really have a locality. there is a huge controversy right now with locality animals and how they should be labeled and how outcrossing with morphs no longer makes them true locality animals...bla bla bla.
just stick with whiteside. if you want a locality animal, you need to get it from a long time breeder that has a known line.
and on a side note, all bull snake morphs with the exception of red and yellow bulls are simple recessive. and $20 is depressingly cheap.