Ron and Peg Roloff have posted a videos of them vacationing in Mexico.
The "Eric" mentioned refers to one of the senior producers of Little People, Big World -- Eric Streit. He purchased a place in Mazatlan, Mexico and turned it into a luxury home.
Amy Roloff has been there a few times.
Sometimes the places viewers see on the show LPBW are influenced by the producers -- for example, the Roloffs have been to Padacuh, Kentucky twice -- largely due to the fact that it is Eric Streit's home town. So now that he has a great spot in Mazatlan, Mexico, viewers might see or hear the Roloffs going to Mexico more often.
Amy was in Mexico staying at Eric Streit's place in December.
You can read the story of these people who met Amy in Mazatlan on their blog:
"Then we ran into Amy Roloff who is on the show "Little People, Big World" She was very nice and down to earth. She said she loved Mazatlan because it is the 'real' Mexico. That it is not an artifically contrived tourist trap is exactly why we love it too."