During my M2c ED last year I left my Warning Triangles, First Aid kit in stock location, and Emergency Vests in the truck. I also put vests and first aid kit under the carpet area where the tire pump is. I forgot to give back the umbrella to the hotel and just laid that in the trunk during drop off as I did not want to carry it on the plane.
When I received my M2c 8 weeks later everything was in the trunk. Nothing touched. I do not think taking all these items is critical. My first ED I did and my second ED I did not. I guess you worry less on your 2nd ED?
Told my CA not to touch the ED plates. 9 months later I am still driving around with European Delivery plates on my car. I cant seem to remove these!