OTC tags are only good in OTC units, not the draw units. I want to make sure you understood this.
How old are you? I had a friend come from NE 2 years ago and he is in his early 50s like me, right up to timberline. He did fine, I had to slow my pace for him a little and stop to let him catch his breath. He became acustom to the altitude in a couple of days. Don't be afraid of going high just pace yourself.
Gselkhunter