Merge branch 'parking-ticket-cahnges' into 'main'

Update parking tickers

See merge request !41

docs/caravans.md

@@ -5,6 +5,7 @@ As with previous iterations of CCCamp, you will be able to purchase a *caravan t
 If you're planning to attend CCCamp with a caravan, please keep the following in mind:
 
 * Parking your vehicle in the caravan area *requires a caravan ticket* (not in the parking area – a regular [parking ticket](https://events.ccc.de/camp/2023/infos/tickets.html#add-ons) is fine for that)
+* If you have a camping trailer towed by a car, and you dont want to sleep in the car then the trailer needs a camper ticket and the car needs a [parking ticket](https://events.ccc.de/camp/2023/infos/tickets.html#add-ons) for regular parking
 * Please bring a 2 kg fire extinguisher if you have fire hazards in your vehicle, such as flammable gas bottles
 
 ## Infrastructure

docs/tickets.md

@@ -24,7 +24,7 @@ For more Details read the [blogpost](https://events.ccc.de/2023/05/29/camp23-pre
 
 ### Add-Ons
 
-You will need an extra ticket to park your car, as well as you will need an extra ticket to bring a camper van. Parking for trailers will be free as long as they come with a car with a parking ticket.
+You will need an extra ticket to park your car, as well as you will need an extra ticket to bring a camper van. Every trailer will require an parking ticket as well.
 
 Parking tickets can be bought at [tickets.events.ccc.de](https://tickets.events.ccc.de/camp2023/). Parking tickets will also be available on-site (**cash only!**).