I started my collection of lightweight camping gear for motorcycle trips 20 year ago. That carried over - and expanded significantly - when I started back country airplane camping 10 years ago. I can go for a week with < 50lbs of gear and clothes, not counting whatever I might bring for water. That includes a 1 person tent, -10C rate sleeping bag, a ‘cot’ that keeps me a couple inches off the tent floor, a chair (or maybe two) and a small table, and Jetboil with dehydrated food. Add in clothes and toiletries for a week and I’m under 50 lbs pretty easily. If I stick to a Mediterranean diet for the month before the trip I can take a bigger tent

I have a base kit that rarely leaves the airplane which includes basic tools, an axe, saw, survival and first aid kits. That weighs 22-23 lbs. Add in my survival vest at another 6-7 lbs.
Without getting in to a lengthy diatribe on survival gear, I place a high priority on communication. Seems to me, in this day and age the key to survival - beyond not drowning, bleeding to death, or dying of exposure in the first day - is someone knowing where you are. I have 1090ES ADS-B, and I know Aireon / Nav Canada can track me in the far north because I’ve pulled the PAPR reports to confirm on multiple occasions. I have my InReach, which tracks and text messages and has bailed me out of a bind a couple times in the past. And, of course, a 406 ELT. To all that gadgetry I recently added a Starlink, semi-permanently mounted in the tail baggage compartment.
I almost always have both a spin cast and fly fishing rods but they don’t get a lot of use. I guess I’m not a very dedicated fisherman. I also have an Alpaka packraft but that’s more for spending time at a specific destination rather than a long multi-day journey.
It’s a time consuming exercise culling and sorting this stuff before each long-duration trip to avoid unnecessary duplication and eliminating the low-probability of use stuff. A couple years back I started sorting through the gear at the end of each trip and laying out all the stuff I didn’t use and taking a picture. It’s a helpful reminder when packing for the next trip, which will be the north end of Baffin Island in July.