rewrite hall 4 mentions

Migrated some mentions of hall 4 to campsite.

content/camp_mildenberg.md

@@ -69,7 +69,7 @@ Please always __enter your shipments into the shipping page__. If there are spec
 
 If you need us to __organize transports__ for you then you can enter them onto the shipping page as well, but be sure to also __contact us by mail__.
 
-You can have your __own space in hall 4__ - permanent or temporary - for setting up your equipment and other large-scale preparations. Please __contact us with your requirements__. We can also offer safe storage in hall 4, but be sure to give us a heads-up if you need to store anything larger than 0.5 m² in safe storage.
+You can have your __own space at the campsite__ - permanent or temporary - for setting up your equipment and other large-scale preparations. Please __contact us with your requirements__. We can also offer safe storage in our locked space, but be sure to give us a heads-up if you need to store anything larger than 0.5 m² in safe storage.
 
 We can provide you with __limited tools__, but as we say they are limited. Please contact us ahead-of-time if you need any special tools during the event. __Bringing your own tools is never a bad idea__.