You could mount a panel in a convenient place, or two in two convenient places.
Many devices can charge with just a USB cable, which is a lot smaller form factor than the 12V "cigar lighter."
Our coach has two 12V sockets. One is empty. The second holds a 5-port USB charger, with cables for the phones, iPad, TPMS display and wireless Bluetooth speaker. The display and the speaker run on batteries (for a long time), so I rarely have them cabled to the USB charger. Thus, three USB cables, one charger in that area.
I wired the GPS to a spare 12V source inside the dash. This means I give up the traffic-alert function (it's part of the GPS charger cable). If I know ahead of time (e.g., planning to drive in congested areas), I can plug the GPS charger cable into the open 12V socket and supply the GPS from there, so I can have the traffic-alert function working.