Preamble:
A big problem with this game may be that death or getting raided can have huge consequences. While the developers' intent MAY be that this game have risk and pvp and raiding, players developing their situation for months and then getting raided may, potentially, be too harsh. So much of your progress may be tied up in the quality of seeds and animals that you have.
/Preamble
Bunkers. This (potentially expensive) metal building may be used to store stuff that can NOT be raided as easily as the rest of the base. I comprehend that it might be possible for Personal Claims to be gotten rid of, or taken over. The unraidability of the bunker should perhaps be tied with the Personal Claim. If you own the claim, you can go in. If some of the land it is on is not claimed by anyone, everyone can go in. (I'm not sure if Personal Claims are too easily overcome. The main thing the bunker should do, perhaps, is allow people to somewhat safely claim their stuff and re-establish, either in place or somewhere new.)
This bunker can store one female and one male of every domesticable animal. This may act as a 'savepoint'. You'd have to still keep them fed.
Also in the bunker could be a type of seed bank. Debate could happen on how many seeds of a type and how many types of seeds should be able to be stored.
Also, perhaps, some limited general storage, that would allow a player to keep some chosen items.
The bunker could be a very restrictive building, where you can't put down cabinets, or build anything inside of them. Have premade areas for animals, food and water to feed the animals, seeds, and some limited general storage. Being restrictive is important, perhaps, so potentially not everything of high value is protected.
Thoughts?