I agree with Old Salt's recommendations.  I would add this, though: not only can the hot color or lure vary on a day-to-day basis, the preferred lures AND colors can vary on a lake-to-lake basis.  Forage foods available to lake trout can vary by lake.  My tried-and-true lures that imitate those forage foods may work well in the park's northwestern lakes but not produce as effectively further east.  And vice-versa.

My primary lake trout lure-types are:
  *  Lightweight "fluttering" spoons worked in conjunction with 1/2 oz up to 2 oz weights (depending on depth fish are feeding) affixed 4-5 feet up the line.
  *  Fat-lipped, wobbling deep-divers (I prefer white OR blue & silver).

OS is right about "experimentation," especially as you learn new trout waters.  If you put the lure-types mentioned in this thread into your tackle box, you'll at least have what you need to begin experimenting on a day-to-day and lake-to-lake basis.

Also, a decent canoe-type depth-finder can help you with your lure selection.  My experience is that "feeding" lake trout will come up a long way to grab your lure.  It helps to know HOW deep they are, however, so you get place your bait in the general ballpark just above them.  When they are REALLY deep, I find myself clipping on those 2+oz weights and using Sutton fluttering spoons more often than not.  Nevertheless, I have been amazed to have LT's occasionally come up from summer-time depths to nab lures that can't be running much deeper than 15 feet.

Anyway, that's my two cents' worth added to OS's dollar.

Jimbo   8-)