Excellent advice above. What you have achieved is certainly not going away in 2 weeks. The idea of playing in your head is perfectly sound - after all, it's all in the mind, isn't it? Studying a score without the guitar can be fruitful when it comes to actually playing.
Maybe one of the guides will have a guitar in camp - this happened to me in Botswana. Playing Bach at night with lions roaring is one of my more unusual guitar memories.
When left nearly entirely to its own devices, the central spirit of the Internet hive mind, its great howling id, tends toward darkness.