Running live sound off Honda Generator?

I have to run live sound at my school tomorrow and we may not be able to have extension cords reach out to our location on the field. I know that our band has a spare Honda Generator (it's probably in the range of 3000-5000w) that s available to us. My question is, with our current setup of speakers and amps (Allen and Heath 16:2 Mix Board, Furman Power Conditioner, 2 Seinheiser wireless mic receivers (we ll be having 4 wired SM58 s), 300w passive speaker amp, 2 1000w Yamaha DBR12 active speakers and possibly even our DXS15 600w sub (I don't think the sub would be of much use in an open field though), would we be able to run it off a medium sized generator? If the whole system can't be run from the Generator, can I just run the 1000w actives and connect them using 100ft XLRs? Any help is greatly appreciated.

It should be adequate, however you should see an electrician about wiring up temporary power circuits so you have enough outlets to plug everything in. You will need a couple of 4plex boxes and So cable to remote the generator. Also you might want to use a temporary grounding rod at the generator to be sure all equipment is safely grounded. Using indoor gear outside can be hazardous otherwise even with the Furman conditioners.

A 5000 watt generator should be large enough for your system, but a 3000 watt one might not.

Well it turns out that there was a service outlet on the field itself so we didn't need the generator after all. Other than that, the entire system worked beautifully and projected sound up to a mile away.