Oh, Seems Mm. Jura isn't active these days! We miss her posts. Anyway, there is a guy who is available 24/24 and ready to answer anyone, anywhere and anytime, his name is Mr. Google. Well, you can find the meaning by opening Google’s homepage and type this:" backpacking meaning " and puff a millions of pages are displayed to explain it.
Here are two examples:
"Backpacking: [noun] carrying something in a pack on the back; "the backpacking of oxygen is essential for astronauts"
Synonyms: packing"
http://www.elook.org/dictionary/backpacking.html
"Backpacking (travel): Backpacking is a term that has historically been used to denote a form of low-cost, independent international travel. Terms such as independent travel and/or budget travel are often used interchangeably with backpacking. The factors that traditionally differentiate backpacking from other forms of tourism include but are not limited to the following: use of public transport as a means of travel, preference of youth hostels to traditional hotels, length of the trip vs. conventional vacations, use of a backpack, an interest in meeting the locals as well as seeing the sights."
http://en.wikipedia.org/wiki/Flashpacking#Flashpacking
Finally, Don't Bother Mm. Jura by similar questions :p hehehe. I joke, sure she’ll be glad to help out.
Good luck :-)