What’s the best small GPS tracker to hide in my backpack for theft prevention?

For your budget, you might want to consider using an AirTag. Just keep in mind that it won't provide real-time tracking. It's straightforward to use and can help you locate your pack if it's lost or stolen, although a determined thief might find it quickly.

Consider stitching an AirTag into your backpack's fabric. This way, it remains hidden, but note that it primarily helps if the bag stays with it. AirTags connect with nearby devices to relay their location.

You might want to use two trackers. Place one visibly so a thief sees it, but hide the second one well. This could help you track down your bag if it gets stolen,

Both Apple and Android have similar trackers, like the AirTag and Samsung SmartTag. They work well and are compact. Just remember, they rely on nearby phones to update their locations, so they’re not foolproof if you're in a less populated area.

Honestly, the best defense might be insurance. Thieves usually check bags for trackers or may just discard the bag entirely. Look into adding a rider for your camera gear under your homeowner's or renter's insurance. It's often a very affordable option.