As I said before, I don't recommend people from countries which didn't recognized Abhazia to visit it. First, is case of emergency, you will have no one to help you. There are Russian embassy there and Russian consulate so Russian citizens can contact it if they have problems with local authorities. But since your country count this territory as Georgia then officially you enter Georgian territory without permission from Georgian officials (if you cross the border from Russia), it's a crime by Georgian laws punishable by 10 years of prison. And you can't enter from Georgia, because the border is closed from there because they count Abkhazia as a Georgian province captured by some separatist bandints. If you enter from Russia they probably put a stamp in your passport and if you ever will go with this passport to Georgia you will be immediately arrested. For Russian and Belorussian citizens it's not a problem because we can visit Abkhazia just showing our internal passport (ID) without putting any stamps in it. When you visited Transdnistria you didn't encounted this problem because Moldavian officials allowed foreigners to visit Transdnistria enclave until recent events afaik (I don't know how the things are now but I suspect it's no longer valid because Pridnestrovie is in heavy blockade now from both Ukrainian and Moldavian sides by the order to Ukrainian and Moldavian puppet goverments from their masters in USA). In case of Crimea since you have a Russian visa you can visit safely (I suggest flight from Moscow or St. Petersburg or any other Russian cities, you can also cross the Kerch strait by ferry). Since Russia recognise Crimea as it's territory you are protected by Russian laws there, can contact Swedish consulate in case of any problems, etc. Ukraine counts visits to Crimea from Russia as a crime (they even started a crime case on Silvio Berlusconi recently for visiting Crimea with Putin, lol) but you shouldn't worry about it because there is no border control between Crimea and the rest of Russia so no stamps in passport and since you are not a public person the buisness where you go inside of Russia borders is up to you and Russian althorities and no one else. Also according my own experience police officers in Crimea suddenly become very uncorrupt just because their salary rised like 5 times since they became Russian policemen and very afraid to lose their job, so Crimea is probably the safest place in Russia now, lol. I was driving by Crimean roads for two weeks and chatted with a couple of road policemen there, this info is from my talks with them. Btw I saw quite a few foreign cars on Crimean roads, from EU in particular. Licence plates were from France, Germany Poland and Baltic countries as I remember. I even saw a Chinese licence plate there on some car.