I'm Thai and have been back there a few times the past few years.
One time, I stayed at a resort on Koh Chang (Elephant Island, a few hours east of Bangkok). It was pretty nice, and relatively cheap. And it had wifi. Make sure the room you stay in (or wherever your hammock is going to be) gets good signal. I couldn't get good stable signal in my room. I had to sit out in the porch if I wanted to go online. (Bring bug spray!)
You can stay/vacation in Thailand for relatively cheap. I would recommend you stay on a beach if you can. They have one of the best beaches in the world (not mainland beaches, but island beaches). And definitely take a few days to go sight seeing. Worth it =)
I'm interested in how this turns out for you. Good luck.
ps If you don't get paid locally for your "work", I don't think you need a work visa. And I use TripAdvisor.com for hotel reviews.