Don't buy new camping gear. Hunt Craigslist, Facebook Marketplace and eBay for used equipment. You could also borrow a friend's equipment.
Save laundry lint before you head out. Laundry lint is one of the cheapest ways to get a campfire started.
Use empty prescription bottles to keep track of small items like change and batteries.
Don't blow your budget on buying a bunch of groceries. Use the food already at home and create a meal plan for each day.
Finally, if you want to find a free or affordable camping site near you, search by zip code.
RELATED: Keep this handy: Your 2018 summer camp guide for kids