Sounds like an interesting trip! Don't forget your lens hoods! It will be sunny
And you have a nice selection of lenses to begin with!
For travel, I do it similarly to Adam. Its great to have a WR zoom and a high quality prime. I decide whether i want the zoom to be on the wide angle or on the tele side, and then take the prime from the opposite side. But I usually have the prime as "walkaround" and the zoom for when the prime's focal length cannot get me a shot I want
For example, 35mm f2.4 and 50-200mm. Lately I carry around three lenses, at least two of which are primes. I almost always have the Samyang 14mm with me (great lens, very useful, but its so wide it simply cannot be used for "everything") and then 35mm, 40mm or 50mm prime (for low light, fast AF, walkaround and places where a big lens would be "too professional"), along with the 50-200mm zoom (I don't do tele often, but its a good idea to have it with you).
From your kit, I would take Sigma 8-16mm and DA* 60-250mm, and then one of the primes in between whichever you feel most comfortable with. The ones you have are all high-quality so it comes down to FoV, aperture, and personal choice
About the tripod.. I always have a mini tripod in the bag, but only take a bigger tripod with me if I don't have too much other stuff to carry. Tripods are unwieldy, but sometimes its the only way to get perfectly sharp photos..
Have fun on your trip! I hope you post some photos on the forum.