holiday watering system

[Plot No.69]

i'm away next week and again in the summer for a week at a time - can anyone recommend a holiday watering system for greenhouse and beds, that will feed from the 3 water butts I have (no individual access to mains on the plot)  Plot is 7m x 45 m.  thanks 

[Plot No.69]

[chriscross1966]

You can get solar powered pump systems but I've not tried any myself....The Irrigatia K-12 seems popular adn this http://www.ebay.co.uk/itm/solar-automatic-watering-system-conserves-water-inc-15m-tube-12-drips-supports-/281099237993?pt=UK_Home_Garden_GardenEquipment_HandTools_SM&hash=item4172d1fa69 is the cheapest I've found it. At that price I'd struggle to build something DIY to do the job...