[加州语言] Oral Vocabulary Cards真难啊，请教一段话的翻译

GK级的Oral Vocabulary Cards，故事“Brer Turtle Helps Out”中的一段话：

Brer Rabbit said, “Whoa, Brer Wolf. I do believe it’s against the law
to hurt folks who’ve done you a friendly turn. Now I’d be willing to
leave the whole matter up to old Brer Turtle, who’s been around these
parts forever.”

其中有
do sb. a good(friendly) turn,
be willing to do
leave sth. up to sb.
等短语用法，baidu了才明白。

最后一句who’s been around these parts forever 不太明白，怎么解释？ 请教大家了。