Is this the parking for the Royal Princess cruise to Mexico departing April 27

Yes the parking lot across the road from the center.

I sailed NCL and used airport shuttle for 20. Some of the local hotels have park and cruise rates and shuttle includef.

Yes. You're better off having someone drop you off and pick you up (or Uber/Lyft it) than park during your cruise. They charge a "mint!"

Yes. It's expensive, but there is parking. See if you can park cheaper and then take an Uber in.

Yes