I kinda agree with monkster. The nat geo looks good but for those photo opportunities, it looks kind of difficult to pull out your cam and shoot given a short notice. Also, it means lugging your notebook throught the shoot will be a bit diff, specially if you are in a few days photography trip. You might consider a big bag, which can hold a small camera bag and notebook bag, and only carry what you need out to the field (i.e. kit and prime in morning, flash and kit in evening, etc)... but then again, not sure what is your objective.