- Just MTB shoes works fine for me if I will be hiking no more than a few miles at a time and the surface isn't bad.
- MTB shoes and Crocs isn't bad either. Crocs are pretty light and I find the bulk a non-issue since I just hang them on the outside of one of the panniers or bags. I don't mind hiking longer distances with them if the difficulty of the terrain isn't too bad.
- If I will be doing a lot of hiking including longer hikes and difficult terrain I really like to have a pair of trail runners along. Like the Crocs I hang thme on the outside of the luggage so bulk isn't an issue.
Since I am pretty weight conscious I go with the lightest option that I think will work. On a long tour I may switch up along the way. For example I have bough some light trail runners when I stopped for a week of hiking in Yosemite and on another long tour bought a pair of cheap Crocs knock offs. I also have sent shoes home by US Mail.