Having lived and still have my home in southern Louisiana, we have been involved with both a number of cellular companies and many public safety agencies over the years. Communications will go down during any major hurricane. This is a proven fact. You can't rely on any cable connection for Internet links for a while after the storm. Generally this will be in the order of weeks into months, depending on the amount of storm damage.
Having worked for several radio system consultants over the years, I have seen many radio towers become the victim of the storm. Even microwave links will need to have their dishes re pointed due to the high wind blowing them off alignment. Power will be out for weeks and the roads will be impassable for many weeks.
Don't plan on being able to get anything local for any data link you may need. Don't plan on being able to use the local electrical power, as it will be out for a long time. Just trying to obtain fuel for your vehicles to move around will be a major problem. Then comes the issue of trying to obtain fuel for your emergency generators. You may be able to obtain diesel fuel much easier than gasoline. So your vehicles might be better off running on diesel.
The lines at the gas stations will be up to a mile or so long, if you can find one with electrical power to run the pumps. Plan on paying with cash as the network connection to try and run charge cards will be down. Don't even think about trying to cut the line. Your libel to get shot. People in a storm damaged region have very short tempers and their ability to wait in line is a real test of their ability to withstand the activity around them.
Someone mentioned the use of a satellite phone. Better not plan on that being your prime way of communication. Right after Hurricane Katrina, the first few days it works fairly well. But once the help arrived, you couldn't make a satellite phone call if your life depended on it. With so many people coming into the area, they filled up the system capacity and you were left out in the cold.
Another problem you will encounter is the local telephone central offices will probably be down. Here in the New Orleans area, there was something like 18 telephone central offices that had major damage done to them from Andrew. They either were flooded out or had generator problems, long line cable problems or a combination of problems.
So you will have to plan to be on your own for communications for the first several weeks. Not much will probably be functional after a Gulf hurricane roars through. Make that a snow storm and the problems are some what different, but you will still have the same type of problems.
You might be able to set up a temporary radio repeater on a tall building. But expect to have to lug all the needed equipment up stairs, as the elevator will be down. No power to run anything. So you will need to lug a generator up to the roof to run your local repeater. Don't forget an antenna and support mast. Then there is the issue of fuel for the generator. Don't forget you will have to change the oil in any generator after about 50 hours or so for a small generator and 100 to 200 hours for a trailer mounted generator. You can't expect the local auto parts store to be open to obtain extra oil and fuel filters, oil for the generators and any other spare part for the engine you may just find out you need.
Not trying to blow your ego, but these are just some of the problems your going to run into.
Oh, forgot one major item. You will need to obtain papers to allow you to get pass the law enforcement road blocks to keep out the riff raft, vandals and people just wanting to drive around to sight see the damage. I have even seen the state police even stop National Guard vehicles trying to come into New Orleans after some of the storms that came through here.
You really need to have an agency to vouch for you to be able to get into a storm damaged area. You will need that piece of paper giving you permission for each vehicle to enter the restricted areas. So do your homework. It needs to be done during a time nothing is going on. To wait until the storm hits, your too late.
I know I have gotten long winded, but I don't think you understand the issues a region has when a major storm hits. The law enforcement people will have a short fuse and you don't want to get on the wrong side of them.
The Red Cross has learned over the years just how bad communications is in a major storm hit region. They bring in their own comm vehicles with a satellite dish and phone system. The Salvation Army is a close second with what they bring in. To just say you want to help is fine. But having a plan and working with an establish agency is a much better way to operate.
Don't forget to bring your own food. It will be in short supply as well as something to drink. The local stores won't be open to supply your needs. It has to come with you.
Good luck on your endeavor.