Kinda what I'm thinking also. Well the first time I came I actually applied for a 60 day visa from cambodia with 30 day extension. And used 1 visa exempt after that.
I'm also considering applying for DTV soft power from the US. But if I don't and go visa exempt I wanted to avoid flying there and being told I have too many stamps, even if it's a new year and it's been 5 months since I have been there.