Wharf to Wharf 2020 will be on Sunday, July 26th, so Wharf to Barf 2020 will almost certainly be July 23rd through 26th. As soon as we know more details, they will be posted here.
If you are interested in officially running the Wharf to Wharf race, details can be found here.
Bibs go on sale sometime in the spring and sell out incredibly fast, so get yourself on their mailing list as quickly as possible if you want to be all above-the-board on everything. Having a Wharf-to-Wharf bib does not effect Wharf to Barf, but it is an excellent time.