I use Time ATAC XS steel clipless pedals with Keen Springwater shoes. The latter are pretty water resistant so they seem to obviate the need for rain booties. The cleat is well recessed, so no worries about floors, and the sole is stiff enough for riding but flexible enough for both hike-a-bike and "regular" hiking.

Don't even think about getting road pedals/shoes. I did the Southern Tier in Speedplays and either waddled around or walked around in my socks through stores. Regardless, try walking in the shoe you choose before you buy.

Some people swear by sandals. For me it took one flying rock to the foot to disuade me. I think the logic is that they keep the foot "cooler". I think that for many people experiencing this, the "coolness" is the result of a less constraining fit. The brain interprets constrained blood flow in the ball of the foot as "heat". Personal preference for sure. YMMV etc.

The slit in the saddle, ostensibly to keep pressure off the nethers, is not necessary if one's saddle is property adjusted. The missing section weakens the saddle for sure and probably reduces its service life. More expensive too. I have no problems in that department. YMMV etc etc.