I don't fish high lakes much. But when I was younger I did. I carried in only light spinners, rooster tails, mepps thing's like that. None bigger then 1/4th oz. My reasoning was that I had to carry the stuff and wanted to carry a bunch in a small container.

Ultra light rig with 2 and 4 lb. test. #6, 8, 10 and 12 single barbed hooks in black and gold. A jar each of power bait and salmon eggs. Small nightcrawlers. A selection of small spinners and flies. Local bugs. A creel with a storage pocket. Hook remover. Fingernail clippers. BB split shot. A float or two.
Everything fits into the creel pocket(s).
I've caught Rainbow, Cutthroat, Brook and small Steelhead with this rig. Drop your bait into the head of a churning pool with rocks. Fish are waiting for something to drift past.

Fast 8-10' 8-17 lb. rod and fast 8-10' 12-25 lb. rod. Baitcasting reels with 10 lb. and 17-20 lb. test. #1/0, 1, 2, 4 and 6 single barbed hooks in black and gold. Skeined salmon eggs. 6 to 8" lengths of thick yellow and/or red yarn tied above hook. Medium size spoons with trailers. Assorted large flies in bright colors. Local bugs. Sliding egg sinkers, split shot and rubber core sinkers. In line depth adjustable floats.
I've caught both Steelhead and large Salmon with these rigs. Cast into the rocky bottom current along the edge of the stillwater or at the face of a large, moving water overhung bank.

This should get you started.