One of the pleasures of bike touring, for me anyway, is the tactile use and comfort of a bike. If I'm going to spend x weeks on a bike, I want to enjoy the actual riding, the shifting, and I want to be comfortable physically wise after a days ride (especially on a honeymoon, wink wink know what I mean, know what I mean)

(That's a nod to a nearly 50 year old Monty python skit if you are wondering)

My troll is my baby, I never considered taking something else through central America last year or Mexico this last month and a half. Yes I was careful as fricken heck, never left it out, but I enjoyed riding it immensely.

Only you know your bikes and how you will use them on this trip, ie locking up, but in general, using common sense and good locks is going to be sufficient.
Heavy on the common sense is my recommendation.
Touch wood, nearly 30 years touring and no incidents, but go with instinct on location for locking.