OP, I'm in a similar situation. Got licensed last year in a state that allowed me to use my huge amount of pre-doc hours to waive the need for a postdoc. However, I made arrangements with my job to make sure I still got those hours, and got them signed off on and submitted. As a national register member, I have the necessary hours now banked if/when I change states to work.
In sum, if youre gonna do this, protect yourself by getting 1900 hours of postdoc supervision anyways, and get it banked somewhere so can you can always access it. I enjoy the national register, but I think ASBPP has a similar deal as well as the CPQ that you can get a little later in your career (3-5 years IIRC) that will help you transition to other states later.