I use SIMS because blow up beds give me back ache but many people do find them comfier.
SIMS are warmer because the foam insulates you from the ground. The Lidl and Aldi ones are good (and excellent for kids, as they are less heavy they don’t need so much thickness in the mat) but many people prefer thicker ones. 5Cm or 7.5 or the much more expensive 10Cm. I have managed on an Aldi SIM for 5 years and only just upgraded to a 7.5Cm.
To insulate a blow up bed you can lay down the jigsaw type foam play mats, yoga mats or even a layer of cardboard if it has the corrugated two wall structure.
Nothing warmer than sitting by a camp fire.
I use a power bank, solar charger or the car to charge my phone.
Other top tip; butchers hooks / S hooks in your wash bag to hang stuff over the shower door, and plastic bags to put clothes in. There are never enough hooks and the surfaces get wet.
Tons of wipes. For hands, table, etc.
If you use a gas stove get a kettle.
Easy lunches: layer cheese in between two tortillas, dry fry in a frying pan, cut in quarters.
Think about how you will manage your two youngest while you put the tent up. Strapped I car with a video and snacks?