Thought the right way is to keep the nodal point stationary, with what I've shot using both my legacy shift lenses and newer auto shift lenses, the stitching goes together easily. My feeling is for landscapes, the nodal point is less critical than in would be for a macro subject where moving the lens will drastically change the perspective/p.o.v. of the image.
I've seen the rigs for keeping the nodal point in place (home made, of course), and they are just too unruly looking to be practical in the field.
With a real view camera, it's simply a matter of shifting or rising/falling the back to do the job. But with the full-frame and dx cameras, that's a P.I.A. I'd say go out and shoot and see how shifting works for you in the situations you'll use it for. I'll bet that if you are doing landscapes, you'll be pretty happy to simply shoot a left and right frame or top and bottom, let Photoshop to the pieces together.
If it's easy and fast, you are likely to use it on a regular bases. If it takes a lot of work to do, that will impede your shooting in the field and gets in the way of image making, IMO.