Long-range campsite wireless networking

Hello everyone!

I'm trying to set up a wireless connection for all visitors of my campsite. I've got a wireless router provided by my ISP but it does not reach even halfway through the campsite. I've attached a little plan of my campsite to the post.

I also found the TP-Link TL-ANT2409A antenna on Amazon for £15.

It's an outdoor directional antenna, the manufacturer says it's supposed to cover 140 meters, I only need 79 meters so I guess in terms of range it should be fine. However, my question is - because it is a directional antenna, will it cover the campsite (green area in the plan) in a 180 degree angle from the main campsite house (red square in the plan)? I am also planning to remove the antenna from my ISP's router and attach the TP-Link's one.

Do you think that type of set up would work?

Thanks!

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Yes as long as you do not get a lot of feedline loss.
I have a panel antenna 6 dbi with a 150 mw radio mounted on my tower up about 30'.
I am able to walk about 4 houses either direction with my laptop and keep a decent signal.
On my beam antenna using a grid array pointed to another AP grid array on 802.11a band with 600mw I go 1300 ft through some leaves a couple trees and shrubs. (2 blocks)

Have you also consider possibly installing a DAS system for cell phone coverage?