Geese can survive just fine with a water bucket. But if you want truly happy geese, give them a kiddie pool. They so enjoy bathing, splashing, diving, and to cool off on warm days.
My goose has two backyards, each installed with a pond, a kiddie pool, and buckets of water. She uses all of them several times every day; the ponds primarily for swimming and playing, the kiddie pools primarily for serious bathing. But when we go for a walk on a rainy day and she spots a puddle, you'd think she'd been deprived of water for weeks. I've seen her try to dive under water in a one inch deep puddle! What I'm trying to say: Geese love water.