Care.com often has good people.
I dog-sit and am listed there.
I'm lucky enough that my dad watches Jackson when I go away. There was 1 time when he couldn't (because we all went to Disneyworld together) so I left him with my mother & step-dad (who I live with) and even though I don't trust them as much... they are family, Jackson lives there so he's comfortable with them and the environment, etc. I honestly don't know what I'd do if they couldn't watch him for any reason.