In true writer fashion, we all have different travel techniques. Pantser - very little planned, take each travel day as it comes. Planner - Every.single.detail.under.review. And of course, the fence-sitter of them all - the hybrid. A mix of planning and go with the flow, having a decent framework to depend on and running amok around it.
Whether it's writing or planning a trip, when I get bogged down in details or when I'm struggling to work out a logistical issue, I've found it really helps me to go off-screen. Pen to paper, having pages to move around and scribble on helps me when I just can't figure something out.
Doing this made my trip possible, despite of/in addition to plenty of well meaning travel apps. I broke down and tried it out when I just couldn't figure out an important plot point writing-wise recently as well. A nerve-wracking conversation (man, I still feel like an idiot discussing anything I'm writing with anyone) followed by a quick dissection of the problem, pertinent info and a piece of paper and voila - a workable bit of something to get back into the sandbox with.