RickH wrote:One useful item may be a multiway charger.
I have a travel adapter / multi-port charger that I have sometimes used that way. I forgot about it until I saw your post. I picked it up in an airport Dixon's once when I was travelling for work & forgot my travel adapter. IIRC, the one with 4 USB connectors was only a little more than the plain block with folding out plugs. All of my recent tours have been close to home, so I haven't needed it, but it has been an extremely handy thing to have along on a few occasions.