Couple of questions for ya.
How far is the pond from the garden (horizontally), and how far much higher is the garden than the water level in the pond? (vertically)

Do you have a generator?

Do you have something that can transport a 275 gallon tote full with water in it?

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).