Just started introducing solids to my 6 month old. when you go out for the whole day on weekends, would you bring the puree food out? or just feed breastmilk for that day?

If you have a way of keeping the purees tasting "fresh" without the help of a fridge, I think purees would be fine. If not, you can get one of those baby foods from the store, the ones in the little jars. That's very common with my friends. I also know a mom who brings fresh bananas with her and simply mash them with a fork and that becomes baby's snack for the day. But of course, breastmilk is convenient if you have no qualms breastfeeding in publlic or have access to spaces to nurse :)