Almudena

Another suggestion would be is to get in contact will a local travel agent in Chiang Mai and get them to purchase the tickets directly from the Station for you for a nominal fee.

It's best not to use it, it doesn't show all the available seats/cabins available on the trains. Tickets can be bought up to 60 days in at any staffed passenger rail station where they have more seating options than the website and there's no booking fee.

Not at all, because you can put them under the seats and keep an eye on them at the same time.

There's no need to book through 12go.asia as it's safer to book the Chiang Mai train directly at the station in Pattaya. The fare for a 1st class cabin for solo occupancy is 1953Baht and as there is only about 12 rooms on the train, you will need to book well in advance. The station master at Pattaya station speaks English and is very helpful. The trains at the moment still terminate a Hua Lamphong as it hasn't closed down yet. The views from the line though the rural countryside to Bangkok are pleasant and nice. The train itself is quiet up until Chachoengsao where it's gets crowded with students that all get off within half hour down the line.

The train from Pattaya doesn't go through Bang Sue.

The Monday to Friday train service that leaves Pattaya around 2pm connects with the night sleeper service train to Chiang Mai in Bangkok with plenty of time to spare. You can buy tickets to any destination in Thailand in advance at any staffed station in Thailand. The fare to Bangkok is 31Baht and the night train to Chiang Mai with a bed is around 1000Baht. It's recommended to buy the sleeper train ticket in advance as those trains tend to sell out quickly. You may think that the Pattaya to Bangkok train train takes around 4 hours, however it's saves faffaling about with taxis etc as the train will take you directly into Bangkok Hualapong station. Plus the it's nice scenery from the train, take as much luggage as you want. Much better than the bus, but being a train buff myself, I may be a bit biased.

It really depends on how clued up the employer is on this subject. It can definitely be done as I've had mine done as long as you have a few weeks remaining on your permission to stay. If the school regularly employs foreigners legally then they will know exactly and have the required documents for the immigration office.

Yesterday, I'd just done my very first online 90 days reporting using the same link that Ubon Joe posted. It's just been approved. However when immigration changed the permission category of my previous non-imm 3 months ago and extended it for a year, I did ask them to put my address details into their 90 days reporting system at the same time as extending the permission of stay. They did and stapled the receipt of notification into my passport. As I thought you could only do the reporting online only after if you've already been to immigration to do your first 90 days report.