By Lindsay Rogers Even under the most idyllic of circumstances, planning a trip can be a bit of an undertaking. To start, there’s the matter of figuring out exactly where to go, booking your airfare, finding accommodations and then, of course, not least of all, figuring out how to pay for it all. It’s stressful enough to make you wonder if all that rest and relaxation on the other end is even worth it. To make things moderately easier, you’ve likely — on at least one occasion — turned to an online travel agency (OTA). For the uninitiated, OTAs are different from aggregators (though you’ll also…