Advice needed: Denied in Krabi Airport last year.

Hello,
Backstory: I were denied in Krabi last November, too many visas on-arrival: Ms. head of Krabi immigration, stamped me with clauses 12.2 + 12.3 and no questions, soI spent the night in detenction room andnext morning bounced back to Singapore.Finally came back to Spain, my home country.
Situation: Right now, Im processing my SETV in Spain and have a clean passport. Yes, I know the refusal is still in their system. Im flying to Suvarnabhumi on March withoutgoing flight, hotel bookings and required cash, planningto get back my camera and visit some friends in CM.Not really interested into stay there, so a week is enough.
Questions: Posting here as Im becoming a little paranoid, can somebody give some advice, please?.
A. Should/Could I book an international flight from Suvarnabhumi to Kuala Lumpur, checking-in online toavoidairport immigration, and entering by land?
B. As the point is to not bounce back to Europe (€€€++), is there any possibility to choose where to go and have some holidays?. Last time, they just allowed meto buy an AirAsia ticket to Singapore.
C. Any other suggestion not exposed here?. As I become really nervous under pressure, tips to avoid IO questionning are welcome, too.
On a side note, never overstayed, theresno ban andno rectangular red stamps. As well, noforgotten details in the story and no evidence for 12.2 and 12.3.
Any help is really apreciated.Thank You in advance.