Vacation or Banked time - Palm Springs

I've been going back and forth between using vacation time or using banked overtime when I take a week off to go to Palm Springs.  Why the back and forth?  Up until now I was planning on using my vacation for camping trips in the summer/Christmas and using my banked time to pay of my student loan debt (I can just request a pay out if i don't want to use it).

I've decided to use some of each.  With all the upheaval at work right now I'm sure I'll bank a few more hours between now and the trip.  So I think that I'll use 2 days of vacation and 3 days of banked time - That way i can still use a lot of those hours for debt and keep some vacation time for Christmas.

perfect.

Speaking of Palm Springs (again).....what do you all think would be a good way to thank my grandfather?  I said thank you on the phone a couple of times - but I don't really feel like that's enough.  He doesn't really have any hobbies....he still works (even though he's technically retired).  He's passionate about his family and about giving (he still tears up from the donation our family did in his name to Free the Children for his birthday).

So....what do you think?