been caught out to many times backpacking. Alot of the stuff is from then.
This is where I started as well. I spent a lot of time Sea Kayaking and backpacking in the mountains. I figured I could use the same stuff to go Bikepacking as well. It soon became apparent to me that whilst stuff could easily go into a 60L backpack, or 70L of Sea Kayak hatches. Trying to put that same kit into 35L of bikepacking bags was much more of a challenge.
I've since swapped the old Thermarest for a Sea to Summit Ultralight pad, the 3 season down bag for a 1 season down bag. The stove has been downsized to a MSR pocket rocket, essentially everything has been downsized, but not at the expense of practicality or comfort and subsequently it's much lighter.
Tool wise, I've never taken much with me to be fair. I have a small crank brothers multi tool, nitrile gloves, tubeless plugs, a couple of quick links, spare brake pads, cable ties and a small bottle of chain oil. All of this goes into a small tool caddy. I keep the bike really well maintained and I'm generally happy it's in top shape before a trip.
Bags wise I prefer I complete soft bag set up. My seat pack is the heaviest bag at 550g, but overall their all quite light. I've gradually built up my stuff over the years and I'm quite happy now with everything.