Hi Robert,
Since you’re going to be spending very little time in one place at a time, I’m not sure that mail forwarding would be a very viable option for you. In my own experience with international mail it can take as little as one week and as long as one month (though that is extreme) for mail to arrive. Your best bet will probably be to have a trusted friend or family member collect your mail while you’re away and take care of anything urgent.
Another option is to use a remote control mail service such as Earth Class Mail (www.earthclassmail.com) where your mail will be sent to a processing center, opened and scanned, and accessible by you as long as you have an internet connection.