I normally carry a Glock 17 with a 26 as a back up. I also carry a double reload of 17 mags.
The mag compatibility, as well as the guns basically being the same gun function wise, goes a long way. The smaller 26 can become another 17, with a simple mag change, that can be handed off to those like my wife, and a buddy or two, who refuse to carry their own on a regular basis.
The 26, while smaller than its big brother, has the same sights as the larger guns, shoots like a full size gun, has a decent capacity with its factory mag, and can easily carry its own weight as a primary, if need be.
As far as it being "a lot of stuff", its really not any different than carrying anything else. If you use the right gear, its very easy and quite comfortable.