Done it three times on the Fort Belknap reservation in north central Montana. Last time was 29 years ago with my son, he was 10 years old. I have used 22 lr, 17 Mach IV, 222, 22-250, 6mm Remington, 6mm AI, and last but not least for the really aggressive ones that charged, a 300 Win Mag. My first reservation license was $17 for a year. The next and last was +/- $50 I think and it included my son. The second tag started the first week of July and I went back the middle of June the following year. Two trips within the same year. This was before the "guide" requirement. Ran into one group of guys at the diner in Zortman from Washington state that were whining about the lack of shooting (15 or 20 shots) for the group. They hunted BLM land that had been pounded for two plus months. They were dumbfounded when we told them we probably got 200+ each on the reservation per day. Their immediate response was there was no way they were going to pay for the reservation tag. They admitted to saving up for two years and using up over a weeks vacation for the trip for a shoot that was a bust for the unwillingness to buy a cheap tag. DUMB!