I definitely charge my clients a sufficient fee when they ask questions, no worries there. If I didn't I don't know how I would afford this trip in the first place!
I have numerous business clients that use my software to run their companies and I am the only line of support (working on finding a reliable programmer to provide front line support while I am gone). Such is the life of a custom software developer...
I'm not going to charge them through the nose because I decided to bail out of normal life to go ride a bicycle for a few years
PS: we have a blog!
http://www.advriding.net/