A company we invested in during my venture capital days did tracking software solutions based on embedded RFID tags. Mainly used in the medical field to ensure gauze, instruments, etc weren't left inside a patient.
Let me know if you are interested, there are bound to be cheaper competitors out there since it doesnt seem like size or sterility of RFID chips is an issue for you.
Glue RFID tag to piece of equipment and save that chip as a piece of equipment. Repeat for rest of equipment. Just waive the wand over a bag or in the inside of a truck and presto it will give you a detailed readout off al the gear that you have brought with you.
Simple.
-Sam
Tigret Tamer.
Luxury is the lubricant of life.
Put a little gravel in your travel.