When my mum was in her last days, with cancer, the nurses suggested on one particular night that we should stay with her, as they expected she would not live through the night. We stayed, mum survived the night (albeit drugged up to the point that she almost certainly did not even know we were there). The nurses then said that we should go about our lives as normal - or as near as normal as you can be in the circumstances - but to keep our mobiles switched on. So for a couple more days we went back to the pattern of just visiting in visiting hours.
On one particular day my wife visited in the afternoon but mum was unconscious. We were due to go to a music event that night and my wife asked about whether we should go. Same advice was given to us: go but have a phone with you. The hospital called at about 9.45pm and suggested we should get down there. It was only about a 20 minute drive. Mum hung on until about 1.30 in the morning, and then passed away. She had not responded to our presence, but we were there at the end.
Moral of the story is that the medical staff can't be perfect, but do have a pretty good idea of what is going to happen and when. Talk to them.
Would I have gone abroad in (what turned out to be) those last few days? No, because I don't think I would have enjoyed myself whilst constantly wondering if the phone was going to ring with a "get here now" message at any moment.
Best wishes to you however you decide.....