don't worry about any state besides Colorado. As mentioned, you are in the clear if you are a law-abiding citizen and a resident of CO and hunting in CO.
Keep it unconcealed like you said to be sure or further research the laws if need-be for concealing it(as I am unsure on the conceal part even though you are definitely legal if it is open-carry at the very least).
is a good website too; click on the state of colorado after going to the website. have fun plus happy bday a little early.