you will be able to be involved in conquest only during the reinforced fights, as far as I know, the seas do not regenerate so long as you are in wilds(not part of a territory that can be claimed) your best bet for not being raided would likely be a home at the bottom of the ocean, a decent distance from the mainland, and at a y-level where you are unlikely to be found by people mining, bringing animals to this home would probably have to be done either by a tunnel to the mainland or boating them to a spot above your base, and removing the water in a 2x2 area for a little while, and dropping them down the air pocket into a pool to stop them from taking fall damage.