That sounds great. We don't get enough rain here to fill up a pool, but it would definitely would be nice to have at least a rain barrel. Right now it's just containers--buckets and stuff.
We had a bunch of barrels, and before last year they were sufficient to get through the July and August drought. Last year they were empty by mid June, and little or no moisture.
We hauled water daily for the perennials, fruit trees and bushes and let the garden burn up except for the batch of heirlooms grown as seed stock.
This pool is about 4000 gallons IIRC, so we should be okay this year, if we get decent spring rains.