I moved from Fort Collins a few years ago. Red Feather lakes are fairly close and offer some pretty easy fishing opportunities. There is also a Wellington Lake just north of FoCo. It has trout and perch for sure. If you want to get giant trout, South Park and North Park are the areas to to. Antero and 11 Mile in South Park and Lake John and other lakes in North Park. If you want Lake Trout, Granby isn't too far from Denver. I haven't fished much for panfish in Colorado, but I know many of the metro lakes such as Aurora are popular with locals. Only problem with the flatland lakes is they don't always have a long season.
Ice Shanty forum is probably better forum overall, but there is pretty limited activity regarding Colorado ice fishing. There are a couple other sites just for Colorado fishing that have more action. Try fishexplorer.com and coloradofisherman.com. There is a ton of info about CO fishing, especially ice fishing on Colorado Fisherman. (I guess it is ok to share other forums.) You might also find some fishing buddies.
Hope you have a great season.