Been thinking about that $200 limit and honestly it is gonna be real tight if you go for big name brands. Last time I did a festival, the wind caught a tent flap, knocked over a stand, and the kickstand just snapped... ruined the whole day. You gotta be careful with those flimsy hinges on uneven grass or gravel. I would suggest these to stay under budget while getting decent protection:

• <a href=" https://www.amazon.com/s?k=Spigen+Tough+Armor+Pro+ iPad+Pro+12.9+6th+Gen+Case&linkCode=osi&t=t=5422-20" target="_blank" rel="nofollow sponsored">Spigen Tough Armor Pro iPad Pro 12.9 6th Gen Case for the big one because the stand is actually sturdy and locks.
• <a href=" https://www.amazon.com/s?k=Poetic+TurtleSkin+ iPad+Mini+5+Rugged+Case&linkCode=osi&t=t=5422-20" target="_blank" rel="nofollow sponsored">Poetic TurtleSkin iPad Mini 5 Rugged Case for the old Mini. It is a thick silicone bumper that is almost impossible to break if dropped on pavement.
• Fintie Tuatara Series Galaxy Tab S9 11 Inch Rugged Case for the Samsung. The built-in screen protector is huge for keeping dust out of the display edges. Make sure you check the port covers throughout the day. Fine dust at festivals gets everywhere and kills charging ports fast.

Try <a href=" https://www.amazon.com/s?k=Urban+Armor+Gear+Scout+Series+ iPad+Pro+12.9-inch+6th+Gen&linkCode=osi&t=t=5422-20" target="_blank" rel="nofollow sponsored">Urban Armor Gear Scout Series iPad Pro 12.9-inch 6th Gen and Poetic Revolution Samsung Galaxy Tab S9 Case Heavy Duty to save cash.

• UAG: lightweight/tough
• Poetic: rugged/cheaper Theyll handle the dust just fine.

I've managed these outdoor festivals for years and these setups work well without any complaints.

• The <a href=" https://www.amazon.com/s?k=OtterBox+Defender+Series+for+ iPad+Pro+12.9-inch+6th+Gen&linkCode=osi&t=t=5422-20" target="_blank" rel="nofollow sponsored">OtterBox Defender Series for iPad Pro 12.9-inch 6th Gen provides reliable drop protection.
• I've been satisfied with SUPCASE Unicorn Beetle Pro for Samsung Galaxy Tab S9 11-inch as a rugged, cheaper choice.
• The <a href=" https://www.amazon.com/s?k=UAG+Metropolis+Series+for+ iPad+mini+6th+Gen&linkCode=osi&t=t=5422-20" target="_blank" rel="nofollow sponsored">UAG Metropolis Series for iPad mini 6th Gen is excellent for smaller devices. This combination fits your budget perfectly.

Honestly, trying to gear up three high-end tablets for under 200 bucks while expecting real durability is a tall order. I have seen way too many rugged cases fail because the materials are just subpar at that price point. Unfortunately, many brands claim to be heavy-duty but the kickstands are usually the first thing to snap in a festival environment.

• <a href=" https://www.amazon.com/s?k=ZUGU+Case+for+ iPad+Pro+12.9+inch+6th+Generation&linkCode=osi&t=t=5422-20" target="_blank" rel="nofollow sponsored">ZUGU Case for iPad Pro 12.9 inch 6th Generation: This is basically the gold standard for stands. Unlike the flimsy plastic hinges on cheaper brands, this uses magnets that actually stay put on uneven surfaces. It is expensive tho and will eat a chunk of your budget.
• <a href=" https://www.amazon.com/s?k=STM+Dux+Plus+for+ iPad+mini+5&linkCode=osi&t=t=5422-20" target="_blank" rel="nofollow sponsored">STM Dux Plus for iPad mini 5: I have had issues with cheaper cases not sealing properly around the screen. The STM is actually tested to exceed US Mil-Spec drop tests. It is solid but unfortunately lacks a wide range of stand angles.
• SaharaCase Defense Series Case for Samsung Galaxy Tab S9: Not as good as expected regarding the screen protector clarity, but the corner bumpers are thicker than the basic TPU shells you find on Amazon. You should check out the drop test database on sites like Wirecutter or watch some torture tests on YouTube. You really dont want to find out the hard way that a cheap bundle doesnt protect a 1000 dollar iPad on pavement...