Why didn't C!M apparate?

[huntergreen_3]

No: HPFGUIDX 113645

macfotuk wrote:
>>Unless he was ordered to stay put at Hogwart's by LV*, why didn't C!
M apparate to join his master? How come he didn't 'know' from his
left arm dark mark that LV had been re-embodied? he asks Harry
several times if LV was really back.<<

HunterGreen:
Perhaps, as another recent thread suggested, he wasn't 'real' DE 
before this and, thus, didn't have the Dark Mark. 
Either that, as you suggested, Voldemort wanted him to stay at 
Hogwarts. Perhaps to keep an eye on the reaction to Harry 
disappearing was and report that back later. He might have planned 
for Crouch to continue his masquerade as Moody. After all, Crouch 
managed to fool everyone for nine months, why give up the spy then? 
Imagine if Dumbledore had put together that Voldemort was back 
without Harry (based on Snape's Dark Mark re-appearing/any info he 
might get from Snape if Snape is indeed spying, and the strange 
disappearences, including Harry and Cedric by that point), he would 
have re-formed the order, and Voldemort's spy would have been on the 
ground floor.

macfotuk:
>>* on a theme related to how is it that the triwizard cup was a both
ways multiple journey portkey (thread a month or so back), WHY would
C!M, having achieved his task of sending HP to LV, not 'get the heck
out of there'.<<

HunterGreen:
To retain his cover as fake!Moody, I'd guess. Dumbledore only 
realizes its him after he does something blatently suspicious.

macfotuk:
>>On that last theme, everyone asks how is it that Fudge got a
deatheater there so fast - but could they not use either apparition
or, if not closeby enough to central Hogwart's, a MoM approved
portkey (DDs brings Harry direct to his office at the end of OotP).
Certainly, the DE's show up at Little Whingeing out of thin air in
Ch1 OotP and so can either apparate or were sent by an unregistered
ministry portkey.<<

HunterGreen:
I think it was me who asked that question the most (or all) times. 
Can dementors appaperate? You're right that they had to get to Surrey 
somehow, I'd doubt they'd be missed if they glided or flew (or 
however they move) all the way there. I can't see Dementors using a 
portkey (I don't know why, just seems strange to me), so appaperation 
does seem the most likely answer. Did Fudge send an emergency owl to 
Azkaban then? Or use Floo powder? Do fires even work around 
Dementors? (or is that movie contamination?). 

Although this is a question that can't really be answered, I wonder 
if there are any humans that work at Azkaban. In that case the human 
would be the one watching the floo fireplace, and would have been the 
one to deploy a dementor (if so, however, someone could easily find 
out it was Umbridge who send the dementors after Harry, but that's 
assuming an investigation was actually done). We know Dementors are 
the ones who feed the prisoners, but do they make the food too? Or 
are there Azkaban house elves?