All very good advice above.
My 2 cents: Mithra’s point on the crystal polymers will get you through drought times when the stream near your spot drys up in late July.
Chicken wire cages to keep the damn rabbits from eating the plants you just placed.
Dead Line around your holes every time you visit after a heavy rain. Slugs will either eat or slime up your most beautiful colas.
Water bed bladders are cheap reservoirs, but they’re fragile.
A 5 gallon bucket with a hose attachment at the bottom placed in the stream uphill from your spot with lots of hose beats hauling buckets of water.
Use dead fall to make a natural fence around the spot. Keeps bigger critters out.
Best of fortunes!