Or maybe you will also consider the Baofeng T-57? The radio is similar in functionality to the UV-5R, but waterproof (meets the requirements of IP67). If you need to go fishing or in the forest, moisture resistance will come in handy. As for power, these types of radios have a catalog power level of 4 W and 5 W. There is a Baofeng UV-5R HP version with 8 W (High Power version), which is equipped with a three-stage output power control (1 W, 4 W and 8 watts). There is also Baofeng UV-82 HP with power increased to 8 W.
Putting aside
legality of use of the equipment and
Legal issues and the health impact of the antenna and the transmitter, the sense of increasing the power in this type of devices is debatable. First of all, the scale is not linear, so this "doubling of power" will practically not be felt within the range. So instead of operating with a higher transmitter power, it is much easier to obtain positive results with a better antenna. You can easily find threads on this topic, for example here:
https://www.elektroda.pl/rtvforum/topic2815429.html