I'm pretty serious about my fishing, and when I take off to go fishing, I'm usually working hard to find or get to very inaccessible lakes that are off trail and hard to reach, all with the goal of larger fish. If I am on a long trip, its even more important to me to be totally prepared. Here's my setup(s); the easy, short trips, I might just bring a pack fly rod, and then an UL spinning reel with 3 or 4 spinners or spoons, and a bubble or two. For the full on trips, I bring both pack fly rod, and an UL spin rod, with a full compliment of flies and lures for each. Even with all this gear, I'm still maybe bringing 1 1-1/2lbs of gear. The whole reason to go lighter is so that I can enjoy this facet of my hiking! Awesome to have it all at my fingertips!
Spin fishing is deadly, and with the bubble and fly its almost shameful how succesfull you can be! But there is nothing better than sitting up on a flat granite boulder at lakeside, and casting down to cruising trout. When the winds are down, and the fish are hungry, I can easily outfish most spin fisherman. But when the wind is up, or the trees close, the spin rig with 2 or 4lb line is hands down a wicked way to work a lake or a stream. You can just hammer them.
Take whatever path you choose, just so long as you get out there!