De or het doorreiscamping?

The correct Dutch article is:

de doorreiscamping

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

How to use doorreiscamping

the doorreiscampingde doorreiscamping
this doorreiscampingdeze doorreiscamping
that doorreiscampingdie doorreiscamping
our doorreiscampingonze doorreiscamping
your doorreiscampingjouw doorreiscamping
every doorreiscampingelke doorreiscamping
which doorreiscamping?welke doorreiscamping?
a big doorreiscamping / the big doorreiscampingeen grote doorreiscamping, de grote doorreiscamping