I live a hour away from there, there Are ways to cut costs. The actual price of admission is fair imo, however, its everything else that gets you... food, drinks, trinkets, parking, etc.
Don't stay there, find a place 20-30 minutes away and take an Uber in and out.
Have a nice breakfast before you go and take some snacks... granola bars, crackers, peanuts, etc. Whatever won't melt. There are drinking water fountains but are hard to find, ask around.
It is hotter down here right now than it will be in July... the afternoon rains will cool things off quite a bit, that hasn't started yet but will be in full swing in July. Bring a smaller umbrella, if not for the rain but for the sun.
If you have to drive there and park have a good cooler with food and whatever... they will charge you $13 for a cheeseburger and fries. Want a beer? $9.
If you have to buy things inside the park for some reason use your most points rewarding credit card.
One downside to going in July besides the heat (there is a lot of AC all over though) is that school is out so it will be even more crowded.
Hope maybe 1 or more of what I mentioned helps... have fun! You won't forget it, that's for sure.