[darkwater]

Ehm, no? Your router still do kind-of connection tracking while NATting UDP requests to, say, outside DNS servers, otherwise UDP would not work at all in a NATted environment. There might be stupid or very stupid home routers but I'd expect the port forwarding rules to be applied only if an incoming UDP packet doesn't match any NAT connection tracking tuple in the router.

[chrismorgan]

As I say, I don’t know, but I would expect port forwarding rules that essentially reserve all the ports to cause connection tracking to give up and go home. zaarn cites personal experience of this being the case on smaller ranges.

[stingraycharles]

Completely up to your router’s firewall implementation whether it prioritizes explicit dstnat port forwards (as suggested in the OP) over srcnat connection tracking.

I suspect that most routers will support a “DMOZ” host, while at the same time supporting srcnat for outgoing connections, but I’m not sure whether it’ll recognize it as such when you also set a port range.