Welcome, and congrats! Sorry about the dent - that's FedEx for you! Not sure what to think about rust inside the smoker, since they're solid stainless steel. Are you sure it's not just discoloration on the surface? Before seasoning, I'd probably just scrub the inside down with a steel wool or ScotchBright pad, then season. I'm not there to see it, so posting a picture of the "rust" might be helpful. Whatever it is, I'm sure it's just on the surface...like I said, stainless steel.
Steve will get back with you - they've been moving and out of town this week. I'm pretty sure he's back at it tomorrow. He probably has 100 voicemails!
Let us know how we can help - that's how we roll around here!