Pumping and separation

Best advice for keeping up supply while separated from the baby? We will be going away for 2 nights for our anniversary and I’m worried about supply issues. I haven’t had any issues but I’ve never been away from my baby for more than one feed. She’s 3 months old and we have a pretty regular schedule and I have plenty of stored milk for her while I’m gone.

Do I pump on schedule with feeds? Do I pump for as long as she would feed (15-20min) or as long as I usually pump (35-40min)