I've done solo, but not in a foreign country. Those who recommend something with a fixed zoom lens, built-in ND filters, a wireless mic and shotgun with xlr inputs, long shoot times on batteries and a way to store your footage are absolutely right. My camera of choice is an old Panasonic DVX100B. I found that the fun part was traveling around to get interviews and thinking ahead for the b-roll shots. The really hard part was the post; capturing and logging, script writing, then edit. It is possible, but after awhile, you're hating a documentary you'll see literally hundreds of times before anyone can give you feedback. However, the finished product is amazing and all the pain is forgotten when the audience applauds you. Best of luck and be careful!