That's sooooo hard!
Okay, rifle number one would be my Remington M788 in .308 Winchester. It will take everything except large, dangerous game and I know it ever so well!!!
I have a number of other choices but I think if I have to pick just one other rifle for this fictional vacation I'd go with my Marlin Guide Gun in .45/70. It can take anything and everything.
M788
No pictures of the Marlin.
Yet.