Just to let you know, not all national parks allow entry with a driving license for concession ticket. If you're a foreigner, you'll need to pay the foreign admission fee unless you can show a citizen ID card. However, if you have a Thai driving license, you're in luck! It not only allows you to drive, but it also serves as a valid form of photo ID for domestic flights and other activities, like checking into a hotel. No need to carry your passport with you all the time!
You could check out the Oriental Express voyages. I think it goes between Thailand to Singapore via Malaysia, never experienced but only heard about it.
You know this booking reservation copy can be an unpaid one. It can be your existing address too as a base. Govt. doesn't care where you travel to as long as there's an address where they can find you.
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.