After completing the first two levels in a class, Jan and I have been doing Level 3 together in a private course, as no Spanish classes are on offer in the summer. We'll get through 3 of the 6 units by the end of July; the learning is progressive so there's a good mix of repetition, reinforcement and new pieces.
UNAM closes for August vacation. I am planning on finishing Level 3 via self-study (it includes 2 new tenses, so I'll be looking for some additional resources online to figure this out) and listening to Spanish-speaking radio - and maybe even watching some TV - online, and just using it more with Jan.
Learning a new language, one I understood OK due to the other languages I know but never actually learned, has been a cool aspect of this trip preparation. 9 months of study and 3 months of 'immersion' hopefully will yield a workable Spanish.