Quick! Which lenses for Taiwan?

I'm headed for a vacation in Taiwan and haven't really thought of what camera/lenses to bring.  We'll be doing both city and country so versatility is important.  I'll be with family so maximum of 2 lenses only.

I have a 50D and a 5DMkII at my disposal.  Lenses I'm considering include 17-55 f2.8, Sigma 10-20, Sigma 12-24, 70-200 f4L IS, 35L and 28-300L.

I was initially considering bringing the 28-300L to be my workhorse and the 35L for low light and around town duties with the 5DMkII but am also considering the 50D with the 17-55 and maybe the 70-200 or Sigma 10-20.

Your thoughts?