My take - If your trip is going to be mostly highway miles, leave it in and do it when you get back.
My main reason? The oil filter on there now is 'good'.. no leaks, and isn't going to back out now because of not being on there tight enough. Do you know for CERTAIN that the filter you're going to put on with the new oil is not going to leak and won't back out while driving? Do you want that to happen while you're 500+ miles from home?
Is it likely to happen? No.. but could it? Yes.
Just my $0.02