Hi, Derek, thanks for your interest and for your question.
Yes, we move freely all over the country, though, if you travel to another region you may be stopped by the road police at the police posts on federal roads. The police may check your drivers licence, also they check if you have necessary papers for the cargo in your truck. Buying a railway ticket or booking a flight requires your passport. So, you only cannot move across the country if you’ve got no identity documents on you. You’ll be stopped and most probably the police will investigate who are you and what is the purpose of your journey.
“What is stopping Tartars deported from Crimea or their descendants simply moving to Crimea?”
I don’t know what is stopping them from returning. Also, I don’t know why Mr. Murray get too agitated on this.
We discussed this earlier on this site, so I’ll link you to the discussion
Commentor Sergey writes 5 clear steps to get back to the Crimea