Does Waterloo still have the Bar-muda Triangle?
I got tore up at the country bar winning the tricycle race, up and down the ramps, what a hoot, 1995 or so.
There's a lot of ways to do it. An easy relay coil power source is the cig lighter, power socket, or radio power wire because it's switched and closeby. Probably the best are those add-a-fuse thingies in the Help section of AP stores that'll let you tap an existing fuse socket and still have a separate circuit. Just pick one.
Does it have to be switched with the ignition on? What about picking it off the parking lights? There are just so many variables.
You'll need to know the total WATTAGE of the lights and the gage of wire you are using to determine fuse size for the lamps power.
I get a lot of info here: http://www.the12volt.com/relays/relays.asp
and searching the relay forum.