Either picnic style or sitting on your lap
But we keep the Chico pocket snack seat in our car for these exact occasions
Definitely one of those booster seats that you can strap to a regular chair 😊
You can put the baby in their stroller and close to you. Or your lap.
I did BLW and allowed all the mess while at home but outside I tried to do differently to limit the mess. I would feed on your lap
Don't bother with sudden introductions of new foods and pouches. Feed off your plate or feed in their stroller