[Baron Spikey]

Actually this is the correct forum if your asking about how many of these things you'd require from a fluff perspective (which you appear to be).

The SW Great Companys are not uniform in their organisation like the Battle Companies of Codex Chapters so there is no right or wrong answer in regards to how many transports/landspeeders/scouts etc to include- though I would suggest you keep the total below 200 Marines (I'm sure that won't be difficult :laugh as Ragnar Blackmane's Great Company is described as the largest after the Great Wolf's with 200 warriors.

 

[Baron Spikey]

See if you can get some of the Wulfen models and scatter them throughout your force (though I'd suggest none of them in the Long Fangs- don't really suit the stubborn and cool headed old wolves).

 

[Baron Spikey]

He controls all the Priests, as well as his own company, but the scouts are in every company the same as grey hunters et al.

Once you start getting close to filling out the FOC with Marines (of any sort) your damn close, if not past, the Apocalypse suggested minimum of 3k pts at which time the FOC no longer exists.