If you want to do a class, then by all means do the AOW eLearning and then do the dives on Cozumel. If you just want to practice skills, then I wouldn't use up my dive days. I'd go to your LDS and use the pool. Or drop by the Aurora Res and do skills there. You could also go to the Denver Aquarium and dive with the fish or the sharks, although that's not exactly cheap. Fun, but not cheap.
We also live in landlocked CO. We dive as much as we can (70 dive in the last 12 months), but in between trips we make sure we get in the LDS pool a couple times. It lets us keep some skills, and also lets us make sure our gear is in top notch shape before we get on the plane.
We also live in landlocked CO. We dive as much as we can (70 dive in the last 12 months), but in between trips we make sure we get in the LDS pool a couple times. It lets us keep some skills, and also lets us make sure our gear is in top notch shape before we get on the plane.