Bring your own snacks and drinks--most MLB stadiums will allow you to bring in food in soft-sided coolers, as well as sealed water bottles and gatorade bottles. Each website will give you their own rules. We were taking a tour of the stadium in Baltimore years ago and noticed a group of picnic tables. The tour guide told us they had an area for families to bring their own picnic before the game. We mostly saved money on bringing in our own drinks; it's important to stay hydrated and water bottles are usually at least $6.00 each at professional games. Most colleges will not allow food to be brought in, but some will allow sealed water bottles.
TRAVEL TIPS
Travel as much as you can, as economically as you can.