The dreaded road century.

I'm back at work after a week off, having done a pretty decent ride yesterday.
I don't feel like working so I go over my training log from last year.
Sometime in the near future I've got to get out and do a road century, and I'm not looking forward to it at all.
From all my past centuries the thing I remember most are the last 30 miles, where its hitting 90 degrees and I'm bonking debating on weather to have the wife come pick me up.
Not something to look forward. It's not fun at all.
I'm really toying with the idea of leaving the house one evening at about 5:00 and finishing up in the dark.
The wife would kill me though. She worries enough about my daytime rides.