I have been on tymlos for 18 months and we are traveling internationally right now. I chose tymlos because it did not need to be refrigerated once the pen is open.
If we were going to be out longer than 3 weeks, I would have purchased a small medication cooler from Amazon. On the whole, I find it easy to travel with. I have the pen and extra pen needles in a zip lock with a smaller ziplock inside for the used pen needles. Of course, I do have to remember to take it everyday, but my routine is breakfast, then my dose of tymlos.
All the best to you and your husband on your travels, whichever med you choose.