So sorry to hear about your sister. I am thinking of you and wishing her the best.
Those conversations with your h sound great! It sounds like he is figuring things out.
I agree that you should go on your trip. We have to take care of ourselves before we can help others. Let it rejuvenate you so that you can come back 100% refreshed.
Me 41, H 47, M 15 yrs, S11, S13 BD 1: 11/4/14 we work on it; really I pretzel myself BD 2: 3/31/15 H goes down to "dorm room" 8/15: H back to MBR 10/15: H back in dorm room 1/18: H files, now divorced