[font color=\'#000000\']The MentorSeries treks usually have about 20 to 40 participants. In many ways, these treks are photography based vacations and perhaps not as hard-core as some would like; however, I've enjoyed them very much.
As you can see from the website, treks are offered on a very regular basis and at locations all over the world. If you don't see anything that you like, just keep checking the website. Also, be sure to check the past treks because sometimes treks are repeated. You can get a good idea of the program and sights (and skill level of the participants) by viewing photos from past treks.[/font]