reluctanttraveler

I'll be flying NRT-SEA-MSP in a couple of days. I've arranged a long stopover in SEA by taking the SEA-MSP redeye (DL 1014, departs 12:55 am). This will be my first time in Seattle, and I'm looking forward to meeting friends while I'm there. This is not the last leg of this trip, so I'd really like to land the upgrade SEA-MSP for a chance at a little more restful flight. Right now I'm a lowly FO but the NRT-SEA leg will push me past the GM threshold.

I have two questions for the collective wisdom of FT:

1. What time should I arrive at SEA to make the 12:55 am departure? (That is, how bad are the security lines at that hour?) The friends I'm meeting have told me to expect horrible lines departing SEA, but none of them have flown the redeye out.

2. Is there anything I can do to improve my upgrade chances SEA-MSP? (Upgrading with miles isn't really an option; this is a T fare and I've already flown the outbound.) Is the 17-hour stopover enough time for DL's computers to figure out that I've made GM and automatically give me a better shot at an upgrade? Or can I help the process along with a phone call?

Thanks!