De or het minicamping?

The correct Dutch article is:

de minicamping

Rule Words ending in -ing: almost always de. See the rule

How to use minicamping

the minicampingde minicamping
this minicampingdeze minicamping
that minicampingdie minicamping
our minicampingonze minicamping
your minicampingjouw minicamping
every minicampingelke minicamping
which minicamping?welke minicamping?
a big minicamping / the big minicampingeen grote minicamping, de grote minicamping