(from a dad's perspective)
1. good (waterproof if possible) digital camera
2. external USB hard drive (to save the sea project data...and pictures!)
3. good pair of boots/shoes
4. pictures (so he/she doesn't forget who you are)
5. a cell phone that will accept a foreign SIM card, so he/she can call you...not that they will...
6. did I say camera?
7. Laminated posters of Ragin and Hauser, for those lonely nights