B0SS-H0G707

Hello to all, my first post here. I have read through the forums and have learned quite a bit, so thank you. Having said that, I am looking to catch bigger fish. I have a few private ponds that I currently fish at and have had success in catching many fish, but none that I would write home about. One of the biggest factors I've learned here is about the temp. of the water. I plan on getting a thermometer next season. I'm confused on what I'm doing wrong though, I figure if there are decent sized bass, there must be lunkers as well. I have been catching bass that are in the 12-14 inch range, but many are not even registering a pound, except for a few. I've seen a few "trophy" fish just hanging around, but have yet to catch one. So far I've been using mainly a sectioned lure (rapala?), with some frogs for the weeds, and an occasional rubber worm. Don't get me wrong, I love just catching fish, but I want to know what I need to do to "up the ante" so to speak. Specs: water temp = unknown, ATM Rod/reel = spinner reel/ uglystick Location = very clear "never gets fished" pond about 3-4 acres, in Northern California ( 1 hour north of San Francisco) Replies appreciated.