Since I've been doing so much traveling of my own, I thought I'd write a little bit about conjure for travelers.
A great 3 ingredient packet for travel I like:
-Comfrey
-Mugwort
-Rue
First, one of the most traditional roots associated with travel is comfrey. It can be added to packets or hands, and carrying it on you will ensure your travels are safe and worry-free. Next, fresh mugwort leaves are used to line the shoes to prevent fatigue, and dried they are carried for protection not just physically, but spiritually. The psychic uses of mugwort are so popular and talked about that sometimes people forget about its use in travel. Finally, rue. I. Love. Rue. It's so powerful and protective, keeping off negative forces and spiritual attack.
If you wish, you can add additional things, such as a St. Christopher charm (patron saint of travelers) or salt.
Now, once you've returned home and you've turned into a lazy purring housecat because your hosts spoiled you so much... hmm, I'm still figuring out how to fix that :D