I'm the assistant disaster coordinator for my +350 person DoD command.
The folks here mean to help but very few of them will be professionals. The survival forum would have a higher percentage of them. There is some good advice above but seek out the professionals.
Personally I went to the local Red Cross for advice on food, water, and comfort items. They've got experts in the care and feeding of victims of a disaster. They gave me figures which I ran into a spread sheet that allowed my boss ($$$) to determine how many days or dollars he wanted to spend and how many food, water, soap, shampoo, and toilet paper days to purchase. He picked 1800 people days figuring that the first day we might have a full 350 man crew and afterwards some people would go home and others would return (unprepared) with their families. Those people are actually welcomed back as we're going to need people to continue our 7x24 mission serving the military.
For tools I went to the local fire departments - both the civilian ones off base and to the near-by Air Force bases "crash and salvage" group. They gave us advice on boots, gloves, overalls, helmets, flashlights and portable lighting, and rescue tools like 8' long pry bars, crow bars, and cutting torches (our building is made with steel beams). Our budget fell short on the cutting torch but we ended up with equipment for a team of 20 men - tool belts, water bladder, helmets, and walkie talkies - the works.
We bought an 8x20 foot trailer to use as a shelter and headquarters figuring that if it was a big one we'd just tip the thing up right and carry on. All the tools and lots of the junk is stored inside. The food and water pallets are just too big to fit inside and the MREs need to be kept cool so their kept in two different locations in two different warehouse areas.
About half of our military guys and gals are single so they'd likely stay in place for the duration and once they'd stablized our command would likely be called out to assist the civil community. We have cots for about 50 people now (dang they take up a bunch of space) and we plan on getting more each year. We're looking at disposable sleeping bags too.
We have a series of disaster plans and review them periodically and we plan to rotate the food and water as it expires.