Back Pack - Fence Post

[PJON]

Backpack
The Hero may now carry an additional three items (one of which may be a Weapon).

Help me understand this

Ok, so a hero can normally carry 4 items. Add the Back Pack, it takes up 1 of the regular item spaces, and can hold 3 items. So a hero could now hold a total of 6 items with the back pack (3 can be weapons) ?

Lets say im a Hero (stop lauging ) I have a Monkey Wrench, Meat Clever and a Fence Post in my Back Pack. How many dice do I roll ?
2 normal, 1 for the Monkey Wrench, and 1 for the fence post ? so 4 total ? Basically A hero can use 3 weapons ?

If im Victor I would then roll 7 ?

Does Victor gain his -extra dice per weapon- using the fence post in an adjacent square ? So If Victor is using the fence post

Fence Post
Double Handed
At the end of the Hero's move, they may make a free Combat attack useing the Fence Post against each Zombie in one adjacent space. If a Zombie wins, no wound is caused to the Hero.

COMBAT BONUS:
The Hero rolls an extra Fight Dice.

Does he roll 7 dice for the adjacent square ? I think not, he is only using the Fence Post. He would get 2 normal, 1 for the Combat Bonus and 1 for his ability. So 4 dice when using the fence post in an adjacent square. ?