Process your own, nothing like learning how.
OTC tags will be for units not as easy to access by a hwy like I70, 285, etc. NW CO around Kremmling, Steamboat are OTC. Leftover tags will be out in July, however those that didn't get their draw and checked leftover tag will get first chance.
To be successful it usually takes hard work and dedication. Luck only comes into play when you have done your homework as far a scouting, and finding where they are.
Road hunters are rarely if ever successful. So get out and get away.