I just wanted to get something started in the Colorado section regarding some camping sites and open space areas that may be of interest. Since I'm within 30 miles of most of these areas, Larimer county seems to be a good place to start. Check out the link - http://www.co.larimer.co.us/naturalr.../ParkAreas.htm
Between Berthoud and Loveland areas:
Carter Lake - One of our most favorite places where the wife, myself, and one of our faithful companions (dog) go to relax and have a few beers while sitting around the campfire. There are 5 campground areas and our favorite is the North Pines campground (dry camping, no electric or individual water supplies). There's only 4 campsites there which makes it nice for having your own little area, but it can be tough to get a spot if you expect to drive in and park on a weekend. There is day use access, a boat ramp, and the sailing club is stationed near the exit of the area. Early in the year when the water level is up and the docks are out, I've caught several small mouth bass just off the docks. Another place we've stayed is at the Eagle campground which has 49 campsites, one is setup for the camping host when they are there during the summer months. Each of the spots have electrical connections and a general access water supply is available. This makes it perfect for that 1st time out and you need to flush the pipes and test the functionality of all the toys in the camper. The southeastern section of this area has an open field and can be some of the better sites if you want to be a little more excluded from the pack. The Big Thompson campground is just over the dam and has 8 sites that have fantastic shore fishing access to the lake. However, its fairly close to the main road and since there is a residential area to the North of it, it tends to get a little noisy. Same with the 7 spots (2 of which are walk in tent camping only) at Carter Knolls, but if you want a good view and close access to fishing, these two locations might be your cup of tea. Finally, South shore campground has 30 spots to camp of which 6 are walk in tent camping and the other 24 have electrical hookups and general water access available. This campground we've never stayed at, but we've driven through it several times to scope out or next plan. It seems to have the most variety of all the campsites by having several close quarter sites, which is optimal for groups and large family outings, close fishing access, a boat ramp, volleyball section, large group gathering areas, and trail access. Eagle is the closest to the marina and the trailer parking is actually a section of the camping area that allows access to the campsites during the summer but they block it off during the winter months. We've stayed quite a few times here and each time, we've seen migratory birds, white tail dear, and fox. There's stories of bobcats and bears that have gone through the area also, but i have yet to see any of those animals. On the North entrance of this area, there is a bar/diner place and a mom & pop general store at the top of the hill that you can visit or pick up supplies like bait, supplies, tackle, or food (Don't expect a huge variety, its just the basics). The general store also has some camping spots if none of those other areas sound good or if the park is full. On the South entrance is the dump station and there are two entrances to it so that vehicles don't block the main road to and from. Don't block the road or pull off into the grass, the county sheriff does come around quite often on Sunday during checkout time.
Flatiron Reservoir and Campground - There's 37 camping spots, 3 of which are walk in tent access and there is also an additional 2 camping cabins here if that's your thing. There are shelters and group areas along with the horseshoe pits and a volleyball area. We've fished this area and most of what you catch are stocked trout, but for the most part, it's a quiet place to enjoy the day you chose to call in sick (cough cough). We've never camped yet....yet.
Pinewood Lake and Campground - 25 camping spots, 7 walk in tent sites, day use shelters, trail access, and good fishing access. This is a lot like Flatiron as far as the type of area to expect. It's fairly small and quiet for the most part. We haven't camped here yet either, but it's on our list for trying it out during the week when there's less crowds.
Ft. Collins area:
Horsetooth Reservoir - (have to work now...i'll come back to it and edit with more info later)