As a former magazine editor, albeit in Australia, usually answering snail mail letters took on average about three weeks, legitimate emails two to three days...but that is only when they contain something of interest to the magazine.
However as more and more posts slowly reveal what your message contained, I would hazard a guess that it has long been disposed of with the thousand or more similar queries received each week, showing no previous experience, knowledge or ability which could be useful to the magazine. (this is not to say that you haven't gt these things...just that you haven't made them obvious in your message)
At best you will receive an answer saying more or less show us some pics when you return from your trip, and we may look at them (notice "may" look at them)...most of the thousands of potential s never even get around to doing that!
I wouldn't get your hopes up too much because of all the potential contributors to a magazine, probably one per year shows the right kinds of skills and the "stick at it and then keep doing it again and again " attitude that a magazine editor wants to nurture