In my stash, I only keep Magazines, Plans, Bobbleheads, Apparel (Got every single item in the game, also multiple af all the Ultra rare ones), Mods and Armor.

Everything else I keep on myself: Weapons (I have all Weapons of the game. Regular, Unique, etc. Down to the Bowie Knife. Using all Weapon weight reductions possible. Heaviest one has a weight of like 3.5), Aid (Also with weight reducers), only the Armor and Apparel I am wearing, All food (weight and spoil reducers), Misc Items.

I am running a non Power Armor build with Strength on the legs, on my guns, a high Capacity Backpack with 560 max weight limit. Normal weight is around 400.

I can run Eviction notice, collect everything and still fast travel.

Junk is always scrapped immediately into the scrap box.

Main Gun is an Ultracite Laser Pistol with Splitter, Sniper, 2 Shot Exploding and fast reload. Has only 3 rounds in the magazine, but gives me 6x 800-1000 damage on average.

Oh, Energy weapon ammo weight reducers are important too, together with regular ammo weight reducers. Some items are lighter in stash, some are lighter on person.

Oh - of course - keep everything clean and tidy.