Outdoor Wireless Installation

I've been asked to see if this location can have wireless throughout the entire resort. We have 1 clubhouse that has internet now, but we would like to broadcast that wireless over .5 miles/2640 feet in a heavlily wooded area. Here is the image of the location:

I was thinking of using some Cisco Outdoor equipment 1505G with a 14db Omni or sector antenna. With the combiniation Cisco states it will range 2.5 miles, however after looking at the location, it is very heavily wooded and will it still be possible. basically, there are cottages throughout the woods that would like internet. So the next question is, woudl they need special equipment in each cottage to gain access to the wireless?

Thank you all for your suggestions, it's appreciated.

Yes that is easy to do , If your device has enough power it will push through the trees etc, some of the people will be able to connect with laptops etc if the transmitting AP has a good antenna with lots of gain, I have used a 16db yagie with a 500mW Ap and covered 1km in side cottages etc for a ski resort with no problems , the unit i installed had a lign of sight range of 30Km so when used in the tree application of .5km it should be no proble, Check it out at www.zigwire.net or email them and they always give me free designes , This is what i would use , you can also use some client units and place them on repeat at the far back locations.
Product Name:AMU-2405G-SMA
Product Class:Long Range Wireless LAN system
Features: AMU-2405G-SMA 802.11g/b 500mW , AP/Client/Repeater/Bridge; LED Wan/Lan/Power; Lighting arrestors protection; Stainless Steel adjustable mounting bracket;No internal antenna panel; Plastic outdoor weatherproof case; -30c~65c ,120/240~48vdc power ,up to 30km with Yagi, 16-dbi gain[not included]

Hope that helps

You might consider using something a little cheaper that Cisco. If all your trying to do is allow people to connect with PCs, I would go with something like Hautespot. Its less expensive, and will do everything you want it to do. Mesh, Firewall, VLAN, DHCP forwarding, STP, RSTP, OSPF, RIP, etc...I have used these routers for a long time, and am very comfortable with them. They are also very reliable.