Pumping question...

Su

I have been pumping once a day to start a bit of a freezer stash. I’d like to start pumping more often to build up my supply and help with that extra stash. My question is, if I’m pumping more and then am not able to pump and only breastfeeding for a day or two will I become engorged and be in pain? I will be out and about with baby on the weekends at my older daughter’s dance competitions and won’t be able to pump. I just don’t want to put myself in a situation where I’m in pain and/or doing more damage than good to my supply.