The only way to export imposed PDFs directly from InDesign is through print booklet. But that only exports a .ps file, which has to be processed in Distiller.
Adobe recommends to create PDFs directly from InDesign, instead of using Distiller whenever possible.
That having been said, Adobe does not endorse or encourage use of PDF creation via distillation of PostScript from InDesign, Illustrator, or Photoshop. PDF created by export from InDesign or saving as PDF from Illustrator and Photoshop is much higher quality PDF, maintaining live transparency, color management, optional tagging, etc. PostScript generated by these programs is optimized strictly for direct printing to PostScript printers or RIPs, not for PDF generation!
So I would prefer to skip the detour through Distiller. Is there any clever way to do that, or do I have to rely on plugins? If yes; which are the best / most commonly used ones?