They were working vacations. You don't need to be in the Oval Office to make decisions. On top of which he needs to connect with his base to refresh his inspiration.
Actually many top executives find they have a lot of time on their hands. It's the grunt work that takes the effort. The decision process requires reflection and a resolution matrix based on some kind of strategy and philosophy. It relies on condensed data, experience, instincts, intuition. It can be made in moments, after some trusted counsel and night's rest.
Look how many lousy decisions were made by much harder working Presidents, Obama included. Many high ranking CEOs might spend all of their time immersing themselves in the minutiae. But that does not ensure good outcomes. In fact it might just cloud their clarity.
Do not worry. Donald Trump is on the job!