For the bike portion of my tool kit, I empty my camelback for dirtbike riding into my tunnel box minus the tire repair items. When I work on my bike, I do most of my work out of my camelback tools so I know the kit has everything I need in it. I don't carry all the custom pullers and the weirdo stuff, but I do have an old Makita drill bag that I keep in my truck that has specialty tools, an extra clutch, electrical system and a carb in it.
For the track portion I keep a few extra side plate bolts, a couple of the plastic idler sprockets and a chain long enough to go around either place needed and a small tusk chain breaker and a master...thats about it. I have all of those things jammed into the timbersled tunnelbox, it fits so tight the washing machine is unable to hit the spin cycle and everything stays in place. All my tools and little parts for the bike are in little pouches I just transfer back and forth from the snowbike to the dirtbike camelback. Like I said I do all my maintenance and repairs with these tools only, even though there is a gigantic roll around box in both garages. By using these tools I know they are there and in working condition because they do get moist when they are in the Timbersled box. I usually open the timbersled box and unzip the pouches after a ride and let everything dry out. I end up needing to oil some of the tools once in a while to keep everything moving. I really only carry 1/4" drive sockets, I am a big guy, pretty strong and I find I can overtorque everything even with 1/4 drive.