Connections, connections, connections ??????

Looking at what I need or feel I need to set up a class C I am planning and buying later this summer. When I had a motorhome years ago all I had to worry about hooking up to 12 volts was a CB radio to listen to the trucker chatter and find a campground I was looking for. Now days even in my car there are a lot of devices I need to connect to 12 volts like my GPS and cell phone. Now that I am planning on getting some things I feel I need or want for a motorhome like rear view cameras, GPS, CB radio, Cell phone, TPMS, GoPro camera to record the trip, and other thing. There are only so many cigarette lighter connections and I am sure if I plugged all of them in I would blow the fuse anyway. So here is my question? Is there a handy dandy device that you folks are getting that would be kind of like and extension cord that you can plug all these devices in with maybe just one connection ran to the cab or coach battery? I don’t need to have these devices turned off with the ignition switch but would need an off and on switch to cut the juice when I want to shut it all down. Any suggestions. Thanks.