QUOTE(river.sand @ Nov 27 2022, 09:48 AM)
As per title...
1. If I drive to Hatyai from Malaysia, what documents I need to bring, and what I need to be aware of?
2. Any recommended hotels?
3. What to do in Hatyai?
4. From KL to Hatyai, what are some good place to have a break, and to makan?
Thanks in advance

1) Driver license and Certificate of Ownership/reg card of your vehicle. You will need it to buy insurance.
2) Stayed at Centara, Lee Garden, Crystal and Buri Sriphu.
My recommendation is Centara and Buri Sriphu.
I tend to stay at Centara hotels all over Thailand fairly often as the quality tends to be fantastic for the price, 4* price but 5* service levels. Spa not that good though.
Buri, impressive hotel though it’s restaurant is Thai food only which wasn’t a problem for me as I do like Thai food more than Malaysian foods anyway. Used to have a very nice spa.
The rest? Lee Garden is good if you want to be where all the action is… and your sole purpose to Hatyai is to satisfy your libido.
3) Massage, eat, massage, go to Songkla if you’re into beaches, massage, massage, live bands and shows, massage and hope no bombs go off. But seriously there isn’t anything to do in Hatyai other than use it as a stopover.
4) It depends what you’re after but my advise is to just keep going and only stop for fuel.