We have a close friend who was born 35 years ago at 2lbs. She's grown into a wonderful adult without any effects from being born so small. Frankly, I didn't realize the technology was that good back then, but it's obviously even better now.
I think you're good to go and, like others have stated, now is the time to call in favors and use your miles where necessary. Have you said how long you will be gone?
As a parent of premies (although nowhere near as early as yours), you're in our thoughts.
Don't forget one thing: While we snipe at each other occasionally on FT, we are a community. You now have friends all over the country (and world, for that matter) whom you have never met but are ready at the drop of a hat to help you if you have local needs.
Mike