I tend to stick with the longer ester drugs. This will allow you to get away with 1-2 injects/wk. for the most part. Also, try to get most ( if not all) your injects at home before and after flying. It is in your best interest to travel "clean" - airport security is just way too tight for risks of this nature IMO. If you need to, send a small parcel to the hotel that you will be using while traveling. I've done this a few times. Again, make sure that you are "clean" when returning back to the airport to go home.
As far as drug selections: Test E, Primo E, Eq, Tren E, Deca, etc...