This is quite interesting. What actually is your observing kit. My kit is an esky that I take into the field, and space is so tight if something doesn't get used, it gets moved into a couple of shoeboxes under the bed!
What's in the shoeboxes... that's a different story
Coloured filters, focus extension tube, cleaning fluid, hurricane blower, eyepiece racks, assorted nuts and bolts, collimation cap (what's that doing there!)....