Temporary wireless network for large venues

Hi everyone,
Just wondering if somebody can suggest hardware for building temporary wireless network for large indoor/outdoor venues like concert halls and stadiums so that we are able to connect to our system while walking around the venue. The bandwidth is not so important, 5 Mbit is just fine. The priority is the coverage, link quality and simple setup. The 2.4 GHz frequency range is quite polluted in these areas therefore I thought about switching to 5 GHz. Perhaps mesh network may work for us as the output power is limited indoors and one AP will most likely not be sufficient.
Many thanks for any advice.

The ruckus zoneflex 7962 works very good for these types of situations.

Keenan Systems Wireless Store Featuring Engenius

They are dual band managed 802.11n AP's with smart antennas. Each AP can handle up to 50 concurrent users.

The zonedirector manages the AP's and automatically selects channel, power output and also manages meshing and security.

Keenan Systems Wireless Store Featuring Engenius

the zonedirector even band steers 5.8Ghz capable clients to that radio first to free up the 2.4Ghz radio for single band clients.

many times when you go into concert halls and stadiums there is existing WiFi causing interfierence. The other issue is a large number of clients packed into a small area. Off the shelf consumer grade routers will just lock up. I have had several clients that have tried multiple solutions without success.

Once they deply the ruckus zoneflex system the problems just go away.

Are any famous brands providing this kind of service as well? This is really an interesting idea.

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I am thinking about Linksys product purchase can anyone tell me what version is updated and in services.

linksys will not work in this application it will lock up quickly and provide sub par service before it locks up :-}