It depends on the situation. For a survival / two-day pack, the Sawyer Mini can’t be beat. Hands down the winner IMHO.
For longer term situations where base camping is the rule, then a gravity feed filter of some type is the way to go.
For your BOL, a Berkey or home-made similar filter is the one.
And I still have my old Katadyne ceramic filter from decades ago. Still works fine; just keep the gaskets lubricated so they don’t dry out. It’s a brick, so it’s a backup thing, but I’ll never get rid of it.