That is totally up to you. But, I can't help but wonder what you mean by burley. Most are rather aromatic, but some can be stout straight burleys. Do you mean that you smoke Prince Albert and codger burleys or like Aged Burley Flake or Burley Flake #1?
If you're smoking the more aromatic stuff, you might want to consider dedicating a pipe. But, if you mean a more natural flavor burley, then you could probably alternate that easily with VaPers and Englishes with no flavor carryover at all. My codger blend pipe keeps a constant aromatic odor to it, and would definitely ghost anything else that I smoke in that pipe next.
But, there's no rules. Some guys like the carryover flavors from a ghosted pipe.