I aways do that kind of travel, and not aways driving, sometimes I need to pass through the airport. Is this case, I would carry everything with me. I usually use a small bag and when I need to use it, just go to the bathroom with it. U can put all syringes, needles, drugs wrapped in plastic bags, everything inside the small bag.
But answering your questions.
Adex, you should not use a higher dose, I did it before and I just got sick, but it was really higher dose (I woke up at night and took 4 tablets, confusing with t3 that I was taking 100mcg... no good! Really sick!. Carber, I don't know, never did it.
1 - I would take your second shot at tuesday or even wednesday, right before you go. Take your adex/ carber with you, just clean the energy shots or whatever you want to put the liquid.
2 - Don't mix carber with adex... put it in 2 different reciples
3 - Dbol, I used to put orals in pots of vit C
But I would travel with all, don't you have a little privacy there flip?