Baleine, I wouldn't stress about not getting every last bit out of this vacation. The fact that you are tired and are listening to your body is a good thing. The fact that you are protecting your sobriety is a good thing. This is a first for you, don't push it....it is going to be different. If you are like me you are used to doing everything at 150% which is how I got in trouble in the first place. Relax...you're on holiday, listening to your body and getting a lot of sleep is a good thing!