We arrived on a Saturday morning and a security guy of some sort met us, showed us where to berth and took our lines. I asked about the office and he said Monday - but on Monday it was still closed!
The wall has been made more yacht-friendly with the addition of suitably spaced smooth rubber standoffs, which would allow most boats to lie against the wall even without fenders. However, there is quite a lot of surge even in moderate sea conditions and plenty of fenders and long nylon warps should be to hand. Rounded metal corners have been fitted to the top of the wall in various places as an anti-chafe measure, but these are not always in the right position due to the small number of bollards, so anti-chafe precautions may be needed. There are also stainless rings set into the wall to tie on to at various points. We found the wall moderately uncomfortable due not only to the surge but also due to the constant wind accelerated across the harbour, which appears to be standard in Easterly or North-Easterly winds. Best visited in very settled conditions.
There is water from a tap at the end of the pier, and a large rubbish bin, but no other facilities. The boatyard seemed very active, and it would be possible to leave a boat here or have it lifted to have work done. There is a small fishermans' chandlers behind the boatyard.
Restinga is a sleepy little one-donkey town. There is a small supermercado, some bars and one good restaurant (La Vieja Pandorga). There is a long distance walking path from here to Valverde.