I was thinking about going on the Beyond the Ho Chi Minh Trail trip late this summer. In checking the availibity I noticed that there are no people (or maybe 1 person) signed up for the 29July or 5Aug trips. Is there some reason not to do this tour at those times (i.e., brutal weather)? Also, what are the chances that these tours will be cancelled? I am starting school in September, and early August will be the only chance I have to travel. Any advice would be great.