I bought my firearms deer tag and a bonus tag this weekend using the app. Seemed to work fine for the purchase and the validation / registration instructions seemed to be easy. Just need to fill a tag this weekend to find out I guess.
Good suggestion on the roast- I'll give it a try.
I also have a deer sirloin tip (football) that might work ok. I usually crock pot them with vegetables. I just ordered the birria bombs, so I'll try a roast and the deer sirloin tip with the birria bombs.