Sappheira

Hi, I'm starting my Masters program this September with a 4 month research stint in New Zealand. I am currently discussing flight plans with my supervisor and was wondering if it would be ok to ask to delay my flights for a week at the end of my trip so I could do a bit of sightseeing (I'm a huge hobbit fan) and networking (I have some connections with the zoo in Auckland as well as some of the national parks). This end vacation would be completely on my own dime. Am I out of line? Has anyone else on here done the same?