Molly, I am so glad those suggestions are helpful! This forum has been such a great support to me. I tuck my tubing into the waistband of my pants, usually, or a nearby pocket. Sometimes I’ll just pull a shirt over it, but as you mentioned it’s easy to catch on things. Best to keep it stowed. 
If you surf around, you’ll find a number of pump pockets and accessories on Amazon, Etsy, etc., and helpful YouTube posts on wearing a pump in different situations–exercise, prom dress, etc. Many creative ideas!