We always forget that no matter how big we might think camper ownership is, or travelling around wild camping in one, it is still only a minority of the population who participate in this activity, so no special reason for the Welsh Government to even consider us in their plans, I guess?
The UK is a generally an unfriendly environment for mohos and campers to start with, so I cynically doubt we will have even entered their thoughts.
Their focus will understandably be on geographically anchored businesses; official campsites, holiday cottages and other land and property-based accommodation etc.
On the other hand, we as camper owners don't have to be constrained by any of the above for at least several days at a time
Therefore the risk you are prepared to take re the virus and camping out overnight is something that can only be decided by each individual according to their own personal circumstances, imho.