I've heard reports where the tactacams are horrible with battery life. Only lasting up to 2.5 hours and that's when turned off.
I can confirm that even with battery off, it drains. You need to have a battery charger with you all the time.
What you can do with a tactacam is use it in a static position to film with a remote control to turn off/on. With the remote you can control something like 5 cameras simultaneously. More than I would ever want. So... if you had a bait pile or decoy out somewhere then you could get different angles on the activity with multiple cameras. One button to turn on/off multiple cameras.