A 120 lvl stego or higher u should reconsider too not bring a Dino stegos are slow but powerful. If you brought your Dino it would have a good chance of dying depending on what it is people that want to tame stegos are probably lvl 45. You should trap the stego in a little one by one and then knock it out. I would highly recommend using tranc darts. It would be very easy if you used this strategy I tamed a lvl 217 stego wth the strategy it had a high taming rate so it went up 50 levels witch is amazing. You should tame it with kibble or veggies. Berries do work but that takes about two hours so my recommendation is most likely is kibble it’s favorite kibble will tame a 120 in about 30m-1hour. And will turn out about at level 172