Traveling with a drone to the Czech Republic?

HelloI will soon be going on a vacation to the Czech Republic and want to take my DJI Mavic Air with me. I have read about drone laws in Czech Republic that flying over non-populated area with the drone in line of sight is okay. Is there anything else I need to know? Any permissions or something like that? I will not be doing any commercial flying.I'm also curios about traveling with the drone batteries in my luggage. According to some info I found it is safest to travel with all batteries out of the drone in carry on luggage, is this correct? I will be traveling within Europe with Czech Airlines.Any tips are well appreciated. via /r/drones http://bit.ly/2HHl7Ej