Dents and cracks should be fairly obvious, even if you need to get up close with a flashlight.
I'm nto sure if this works for aluminum or just carbon, but if you take a quarter and tap on the tube, a damaged part will sound different.
I'd carefully inspect the bottom bracket area, seat tube, downtube, fork, and chainstays based on your description of the other damage. Also check any point of impact that your bike made with the other bike.

