Quit some (good) answer are given based on smart search. Sometimes you need a been there, seen it, done it kind of answer. Would it be an idea to make a specific tag to require an answer from some one who really have som real experience?
This would be a meta tag, and a bad one for all the reasons meta tags are bad in general.
It's subjective. Do I really need to have been there? Isn't it enough to have heard from someone who was there? What if I saw it from a distance? I was asleep and my wife did all the driving and talking?
For the same reasons, it doesn't help guide answerers towards the questions they can answer.
It doesn't work as the sole tag of a question, only in a supplemental fashion.
And the nail in the coffin: it does nothing whatsoever to help people find the question they're after.
Is there a tag to require real life travel experience?
No, nor should there be, as explained by @Gilles and to some extent covered by Is asking for personal experience on topic (and if not, under what category is it excluded)?.