You can find them safely by range or magic skill, or by melee pray flicking. If you do not have Bandos armor or do not want to risk Bandos you should choose the later method, which is also faster actually.
The recommended place for Ents is the long narrow pass on the east side of the Wild Land. It is dangerous but you can easily log out if you see somebody coming near. There are many trees along the way. We recommend you to attack the two Ents at the Northern part of the road because you are safer since they have a long distance in between, unlike those Ents at the beginning of the road.
Here is what we recommend you to bring with when killing Ents: prayer armor (including initiates), Saradomin sword that doesn’t lose on death, Fury Amulet that allows killing faster and doesn’t lose on death. Being level 75+ in woodcutting, A dragon axe is preferred because you can chop many magic logs and yew logs by the way. Dragon Axe also helps you gain extra three levels before chopping Ents. Following is an example of your inventory list:
1x Tele Tab of your choice
2x Super Energy Restore
1x-2x Prayer Pots
1x Axe (Dragon preferably)
16x High healing food
1x Looting Bag
You can use looting bag to keep bird nests if you are lucky enough to get some. Prayer Pots and Super Energies are useful when you are unfortunately telecom-blocked and need to escape from Pjer.