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Well, if you want to capture night shots it's perfect, but don't forget about changing time of sunrise (and sunset) through the year, so depending on time of the year you should change your alarm clock. I was there in Noveber so I think you can wake up a bit later due to winter darkness.
You also can try to use some apps to help yourself.
The photographer's ephemeris. Great planner with huge amount of info about sunrise/set, moonrise/set, moon phase and other. ([link])
I also use that one app for Android called Golden hour. It has almost the same features than TPE but also helpful. ([link])
Start shooting about 3 hours before sunset. Use an app like fotocast to get photography suggestions based on the weather and time of day, or golden hour to plan the right time to take photos. Use a fill flash or reflector to fill in shadows on their faces and balance the lighting with the scene around. Personally I find flash better and easier to use, but make sure you have it off camera on a stand, about 45 degree angle. Use a portrait lens (minimum of 50mm, but better 85mm+). If you have nice scenery, use F/8 but if the scenery isn't the best use F2.8 to add bokeh to the background. In your case based on your lenses I would use the 55-210.
Tripod is not really necessary for portrait photography because outdoors during the day it would be very rare for you shutter speed to drop below 1/500.
If you have a really powerful flash you might be able to get away with putting the sun behind your subject which is optimal so they don't squint. Otherwise, try to keep the sun about 30 degrees in front of them, so it helps to light to their faces but not directly behind you so they are blinded.
Last but not least, make sure they take their cell phones out of their pockets unless you are doing headshots only.
Can you set up https://play.google.com/store/apps/details?id=com.simplaapliko.goldenhour in conjunction with an alarm as a notification?
'Golden hour' a great app I just found that shows where/when the sun will be, based on your global position. Really helpful in my last vacation. Here is the android link.
Shows: start time - end time - duration... and even where the sun will be from your position on the map.
How is it that the foreground rocks in your photo are showing as red?
Something like golden hour might do the trick.