Colorado has an extensive over the counter tag system. Most of the western GMU's are OTC, while the ones closer to the front range and metro areas tend to be draw only. Some units aren't hard to get draw tags either, keep in mind, while others, takes years. The best chances for big bulls lies typically on private land, and in draw units. There are decent bulls on public land, in otc units, but you will have to do some hiking to get to them. I think you are going to spend $500 a tag or close to that for out of state fees, plus your gas spent, etc. The main two seasons to hunt are second rifle, and third rifle. If you want to try it, do it yourself, and save a bundle. Just leave that 223 at home, lol.