Very useful recommendation! Exactly what i need. Before, I even considered using tile for tracking. Later, I found that it is only suitable for short distance tracking of small items. Its small size is suitable for drones.
Yes, don't use Bluetooth. SpyTec, AMERICALOC are excellent representatives of small-item/equipment trackers, which are fixed to the device by magnets. For pelican air cases may apply, it is recommended that you check them.
If you can, you better consider a professional camera backpack. For example Lowepro ProTactic BP 350 AW II backpack, Vanguard Alta SKY 51D. Otherwise, you can choose a cheaper but well-padded backpack, such as Jansport, YOREPEK TSA.