Kyle, I use mostly hand tools, but if I was going to use a router for the tenon I'd probably use a large straight bit taking small bites. A straight bit would work for the mortise, but it tends to clog up easily. I think a spiral bit might work better.
As I said though, I'm not really an experienced power tool user, so if no one else chimes in here with recommendations, pose your question in the Power Tool sub-forum and you'll get lots of great info.
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