I have taken board games like Monopoly, trouble, sorry etc… It just requires a little planning to keep it light. Draw the board in the dirt. Cut the money into 1/4 size. Switch out dice. Use different pieces that you find near namp, or they use stuff from their kit.
Try games like two, for or even 6 person mancala with pebbles.
Bring parasail kites or black tube balloons to use on sunny windless days.
Card games are good as well .. get smaller size cards.
I have started bringing story dice on trips. Makes for some interesting stories at night.
Before some trips I assign constellations to each boy so they can tell that story if the night is clear.
Frisbees make good plates too.
Backgammon works well drawn in the dirt.
Checkers is a gimme but chess does not draw much interest.
I never ban electronics (except on single overnights) but have simple rules regarding them. If I see or hear them, they are forfeit for the rest of the trip, and the kid gets to carry something in it’s place from my pack, and they are not allowed to recharge them on the trail.
To be honest, no one in the last 12 years I have been leading scouts has abused my electronics policy. I figure they spend the week learning to ration their charge, or learning to carry dead weight after day 1.