24-70 II, 50, 135L, 70-300L.
Week 1: 24-70 II, 50, 135L.
Week 2: 24-70 II, 70-300L.
Another option is to replace the 70-300L with the 70-200 II + extender if you can deal with the weight, esp. for week 2. The 70-200 II can take the place of the 135 and 70-300, so total pack weight might be less but in-use weight would be more.
For travel, I usually opt for the 70-300L over the 70-200 II, but I recently chose the 70-200 II because I wanted it with the 2x to take pictures of the recent large moon. However, every night was cloudy/raining, so no moon shots, but I did use it at 200-400mm for kids jumping off docks into the lake. Over 1000 shots taken, kept about 350, and ended up using the 70-200 more than the 24-70.
If you are bring a tripod for landscapes, you might want to get a nodal slide, which makes panoramas a lot easier.