Add more parcel shop hints

more info about the parcel shop to nudge people to be more eco friendly

docs/faq.md

@@ -23,6 +23,7 @@ There will be a parking lot right beside the camp, there will be no parking on t
 
 ### Is it OK to drive the car on the camp ground to unload stuff for the village on arrival?
 We ask everyone to carry their luggage by hand if possible. We plan to provide carts and similar means of transportation between the cash desk and the rest of the camp ground. If you really need to drive on the camp ground to unload, better come early as we may close the venue for vehicles if it gets to dense. In general there is no guarantee that you are able to drive on the camp ground, you may have to wait for several hours.
+Use the [Parcel Service](#parcel-delivery-to-and-from-the-camp) to save yourself from this stress and hassle. It is also much more environment friendly.
 
 ### Is it ok to come with a campervan/caravan?
 Generally yes, but please read [Caravans](caravans.md).