easy work with you and friend, or you with alt, or you + bot:

1) found a boar and aggro him laik a baws
2) friend/alt (you) come to the point (with boat) ,take the distance of boar, and build a signs laik a baws
3) you need de-aggro the boar (take a distance of a boar, and boar deagro you), friend/alt aggro the boar (your friend is INSIDE of the field signs, but in one extreme..)
4) the boar enter to the trap, your friend need up to boat, you need close the trap of signs (boar destroy 1 or 2 signs meanwhile try enter to the trap), up to boat, aggro the boar
5) kill him laik a baws..
Notations :
X = char with boat
circle blue = boar RADIUS
purple = signs
* when the boar is in the trap , NEVER TOUCH THE GROUND or boar destroy the trap

, have a good amount of rocks for the atack, or use the other side for search stones.
GG.