Should I leave my job?

I work in an insurance job. I have been here for a year, they have spent the past year training me. I like the job, I consider it fun but I really miss travelling and backpacking. I really would like to see most of the world before I am 30. Right now, I am 25 years old. I have my education, I have good work experience. If I leave and take a year offf, chances are, the company I work for won’t hire me again. Should I take the risk and just take off backpacking? I figured its better to travel now than try doing it when I am old. (and no, taking two week vacations a year is completely lame and I dont consider that to be travelling)