[Kidkraz]

Mike, when I dry camp I bring several battery packs. I use a CPAP and depending on how long I'm out. I either bring a 299W pack or a 400W pack. I use the DC side of those batteries so they last longer than the AC side. Extra adapters required, but worth it.
I have several AA fairy lights with remotes, Goal Zero USB string lights, where you can add an extra light if needed.
Also several portable 26800 mAH batteries for the usb fan and lights. I use a 18v Ryobi fan with backup batteries and a smaller usb fan.
If your kids are old enough, give them a project to estimate how much power they/you need for electronics for a weekend.
I use a Mr Heater buddy when it gets colder, others have retro fitted their rigs with a Camco Wave heater.
Oh and scenario 2 is not odd, it's life.