I have no suggestions - but I hope you have a fabulous trip!!
I LOVE the book "Fall On Your Knees" Ann-Marie Macdonald. I'm sure a seasoned reader like you has already read it....but if not, it's great.
Have you read any of Kate Morton's books? I just started "The Distant Hours" and I am enjoying it already, and I heard that "The Goose Girl" is a great read too. Have a great trip!
My latest read was quite gripping and I totally recommend it, fairly easy, not really fluffy but definitely gripping...Wool by Hugh Howey (I got the e-book version though!) Have a great trip!
I was going to mention Dragonfly in Amber, but Im glad I waited until I watched the whole video. You love them, I know you do....
My books suggestions: If you are looking for a good beach read - The Selection by Kiera Cass - it's the hunger games / Divergent meet The Bachelor; a youth novel but a fun brainless read. If you are looking for something else, there is The Great Gatsby, The Night Circus (but I think you have already read that one??), Gone Girl is a great read too, but the one to read (IMO) and a great book is Into the Darkest Corner by Elizabeth Haynes.
Have fun in Mexico! I know of a funny book just being released you may be interested in - Don't lick the Minivan - just incase you know, your still stuck and want something funny.
Haha. JODI PICOULT! You will like her latest. It won't make you feel stupid. But seriously, divergent and insurgent are good. Matched series is good. UMMM. You need an e-reader if you are packing that many books.