Just flew to a host of SE Asian countries (some for work, others for vacation) that had the most restrictive weapons policies around. (Death if caught with an illegal firearm in Singapore)
Being away from home, and not on American soil may be a little different for a civilian who is going from one state to another, so I just depended on the best weapon that we all have - our brain.
Common sense would say you follow the above guidelines provided.
Now I would take some martial arts training and even basic boxing. These will give you the proper HTH skills if you needed to defend yourself. Its about getting out alive if you get into a hostile encounter, but the best defense is to run away or not get into the encounter in the first place, especially if unarmed.