Some of those bungalow eco-hotels look great. But we will have my FH 11 yr old niece (several say no children) and our mothers who might not appreciate a hotel with "limited" electricity. And honestly, I am a bit squeamish about the bugs in Mexico (I got stung by a scorpion there once) so maybe an open bungalow is not for me, either.
Maybe I should look into Play del Carmen...
oy vey!