I've read posts on traveling to Mexico with a Phantom but many are dated and offered different experiences. Does anyone have any 2016 insight as to problems taking the drone? It will be used for private purposes only, on a family vacation. I'm not taking anything other than a stock P3A, 2 Batts, etc., in a backpack. Am I likely to get held up by customs? Are there any other current risks or issues with travel? Thanks!