I've done the same route, SIN-BKK-XXX in C followed by F about a dozen times.
You'll be met and escorted, by buggy for the most part, and then by foot up the escalators and to the lounge. If by some quirk of fate you're at a remote stand, you'll be met at the aircraft and driven in a separate van. Either way, just look out for your name on a board, and enjoy!