We are playing an outdoor show at a private party (backyard, maybe 30-50 people). What do you recommend as far as power? What should I be looking at/for in terms of extension cord and power strip? From what I can tell, we'd be running and extension cord from the house. We need outlets for: Bass head (300w) Guitar (300w combo) Guitar (300w combo) Drum (45w amp for electronic set) Power amp (QSC GX5 2x700w) Mixer (for preamps) Monitor (50w) Monitor (50w) Any advise with that setup?