I guess the OP needs to work out whether their priority lies in being prepared to capture an image of just about any scene/location/landmark encountered, whether big or small, near or far, in daylight or darkness - if this is the case, then as well as the 6D, 24-70 & 35 1.4, they probably need to obtain an UW lens, pack the 70-200, take a tripod, and be prepared to carry all that around with them everywhere.
On the other hand, if photography is a secondary priority, I think the 6D, 24-70 and 35mm 1.4 would have most photographers covered for 90% of scenarios encountered, and still makes for a relatively lightweight kit that's easy enough to carry around for a whole day. For those 10% of occasions where you don't have the ideal lens to make an ideal capture - don't worry about it! Take a less than ideal shot; be creative, try something abstract, or don't take a photo at all - you don't have to create a photographic record of everything you see on a trip! In less than ideal photographic situations, I've sometimes just found a local kiosk and bought a postcard of particular landmark or attraction! Oftentimes having less gear means more time spent actually exploring and enjoying a place
Anyway, that's just a little of my philosophy on travel photography.
Cheers,
d.