You're looking for something like:
iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 10.5.5.9:80
However as each of your wifi adapters has the same IP this won't work because your routing table will be fubar.
To get this working you need to force each wifi adapter to have a unique address on the 10.5.5.0 network and then also set up your routing appropriately:
route add -host <CAMERA IP> gw <WLAN INTERFACE ADDRESS> dev <WLAN INTERFACE DEV>
You'd setup each interface something like so:
ifconfig wlan0 <WLAN IF ADDR> -pointopoint <CAMERA ADDR>
And that should setup the route for you, if not use the "route" command above.