Looks like you've got your work cut out. I don't think there's a problem with bagging fish up for travel, after all, there are plenty of shops that sell them through the post with no problems. If I was you, I would get advice from them because you are going on quite a long journey. I think you are wise and what you want to do with the fish, it's just doing it properly so you actually give them the right amounts of sedation. Not enough will increase the chance of them getting stressed, too much and you could kill them. I have included a website that I find, it might be of interest to you. I think you are going to be hard pressed to keep your bacteria alive over that period of time so be prepared to cycle all over again.
The fish obviously need oxygen to survive and you need to keep the water warm enough. A large container with an oxygen pump would probably be okay. If you could find a way of creating warm water then you could stop intermittently and make sure that the water is okay, if it isn't, add warm water
http://www.aqui-s.com/en/en_live.htm
