I think you should be prepared for all eventualities but look closely at your tools, emergency, and extraction gear to see what is duplicated or can be discarded.
Tools -Although you feel like you can do anything with a complete tool kit, the reality is you'll only need about 5% of those sockets and wrenches to completely dismantle your vehicle. Manufacturers standardize to 3-4 different sized sockets and bolts for the whole thing. Also look at specialized tools, although wheel bearings should be repacked after water crossings it can wait till you get home. Realistically you can probably shrink a 300pc tool kit to 20 pieces and still cover all backcountry emergency repairs.
Emergency Gear - I carry a ton of emergency gear in my truck just for day-to-day driving; if I run off the road in the mountains I can "camp" on my emergency gear long enough to wait for rescue. But since I'm overlanding/camping it's just duplicating what I already have but with better quality gear. Some things are good to have backups but others not so much. If I have a nice coleman 2 burner with me, I don't really need the esbit solid fuel stove.
Extraction gear - There isn't much I like skimping in this area but if you're doing a pavement based road trip you can probably leave much of the gear at home. Or if you know the terrain will be hardpack dirt and rock in the mountains you can leave the sand extraction gear out, etc.
I like to compartmentalize all my gear into individually packed "Kits" so that I can mix and match the parts needed for each trip. If it's a crazy long expedition into the last blank spot on the map take everything, better safe than sorry. But if you're on a road trip to the national park and you won't be hitting any dirt, feel free to shave off some gear.
As for hauling beer, get a camping growler. 1 growler is almost a 6-pack, no weight or bulk from glass bottles. I like the non-vacuum flask ones since it will be in the cooler and I want it to get cold fast.
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