From past experience driving a Renault Master and Mercedes Sprinter WAV’s is there are very few parking spaces that are big enough , so We would go for on street parting on single or double yellow lines without yellow curb flashes (with blue badge)
Or a parking bay at the end of a row in the street so you can lower the ramp or tail lift without cars parking behind you .it is more of a challenge theses days with many curbs have the yellow flashed down the curb edge .
Middle size vans like the VW transporter are still too high for multi story carparks, so you could be restricted to Peugeot Rifter smaller WAV.