Look for local bus or the small mini van they do runs from Pattaya Chonburi all over Thailand

Yes, there are! But remember that Bang Saen, unlike nearby Pattaya, is essentially a Thai weekend resort with a small fishing fleet, that deliver fresh fish every morning, but there are some bars and several good all-you-can eat buffet restaurants, from 169 baht per person.

This area primarily caters for Thai families - wealthy ones mainly from Bangkok who can afford a beach side get away. So even finding an Australian TV channel would be a challenge. Internet access is quite good. Maybe it would be possible to view AFL via this means.

Yes, always!

Jag bodde hos en vän, så har tyvärr inget tips på hotel.

I agree with Vince M - it would be better to get a hotel near the airport (there are lots of inexpensive ones that will pick you up from the airport) and travel the next day. If you do decide to travel to Bang Saen directly, make sure to have dinner first - most, if not all, restaurants in Bang Saen will be closed when you get there. The taxi/car ride is about an hour and a half from the airport (definitely not an hour!). If you hire a car and driver online, it will cost 2300 to 2500 baht.

You can go to the transport hub at the airport and get a coach directly to Bangsean Beach. The coach to Pattaya also stops at Nongmon market from where you can get a songtaew or motorbike taxi for the last few minutes of the journey.

Eating dogs is a Korean & Vietnam thing----not Thailand. There are however a lot of soi (street) dogs depending where you are---they seem to get fed though. Thais own a lot of dogs but they are not treated as pets the way we westerners do. Many/most are kept outside by pet owners. That said, don't let it deter you from visiting.

Didn't stay there long enough to find out. We didn't venture out at night.