You don't mention whether you're taking a full-frame or APS-C body, which makes a difference in lens choices and gear weight, or whether you're looking to produce a pro-level gallery of Camino photos or simply a better travelogue of your trip than you could achieve with a smart phone or compact camera. Either way, I'd suggest one of the do-all travel zooms plus a fast 50mm (full-frame) or 35mm (APS-C) prime for interiors. As you know, some of the third-party travel zooms have "macro" or close-focus feature, which can also be beneficial.