Considering the money the crashpads on there may be saving you, it's worth the cost. Heck, I work for Lakes and I still don't regret spending the $$ for that website. But, if you're hellbent on free, I think crewcommute.com does not charge. Checking around the crew room is an even better bet, as there'll probably be a few pads that you could get with people in your company.

Good luck.