Information from Svenska Flygfält can be accessed here (a page at www.thf-flyg.se).
AIP for ESSE is available via aro.lfv.se/Editorial/View/IAIP -> AIP -> AD -> AD1 -> Förutsättningar för användbarhet, then search for ESSE. The official place for NOTAM is aro.lfv.se, but the location and the links are constantly changing and it not easy to find the correct document. The simplest way to access NOTAM seems to be to google for “esse notam” and find a trustworthy source.
Current field conditions can be obtained through these contacts, or any other member of Skå Flygplatsförening.
Parking space is available and costs 50 SEK per day, payable through Swish or cash. Make contact before parking.