Landing Page / Splash Page With Code/Password Redirection

I am creating a wordpress website for my fiance and I’s wedding and we would like to have the site send people to a specific page based on a code/password they enter on a landing/homepage. The reason we would like to do this because we are having a destination wedding as well as a reception back home and would like to have people going to the wedding directed to one page and the reception people to another.

Is it possible to create something like this and how so? Any examples?

Thanks in advance,
William