does she have a fairly regular early morning nursing time? like before dawn?
*maybe get a pumping in after that nursing session but before "wake-up" time
your milk making is in high production mode early in the a.m. because prolactin levels are up
*you can pump the other side while she is nursing on one side
*you can let her nurse and then pump immediately after
*if she is eating any food yet, you could pump when she eats her solids
How long will you actually be away from her and will you be able to resume nursing immediately upon returning from the study?
Tank her up immediately before leaving and if she does take any solid food, have her caretaker give her her usual solids early that morning while waiting for your return.

Lisa