I think that, at best, Hume might have agreed that it was useful to believe in a Creator, not reasonable. And while Hume certainly said that some sorts of reason - determining causal relationships in particular - were logically unreliable, this is hardly the same as suggesting that all reason is unreliable, nor is it predicated at all on his belief in the absence of a Creator - his discussion of the limits of reason neither requires the presence or absence of a Creator.
"An Enquiry Concerning Human Understanding"
"Dialogues Concerning Natural Religion"
Personally, I'm partial to callocs.