Join page should be branded and marry in with the rest of the marketing pitch seamlessly.
We have tested it and there is not even a question about it.
Definitely, considering it is the most important page of the whole tour - even more critical than the landing page - since it is where people will actually spend their hard earned money - there should be a connection to the rest of the tour. That is what cements the deal and a generic page pretty much loses that. That branded join page is the last big chance to convert those customers.
x
= common sense