Perspective can be an issue for sure - people pick up on these clues/cues unconsciously or even consciously if it's bad enough - if you have miniatures then to achieve normality the camera and everything related to it should be miniature also (even the grain). Not possible, so special periscope 'snorkel' lens systems have been made to fit big cameras into small areas...
The periodical Cinefex although it deal a heap with CGI nowadays has lots of articles on this kind of carry on - you can order back issues of most of your favourite films
As for what you can do with your equipment is just think the opposite way around - whatever tilt faking requires just flip the thinking on it's head - and yes, one of the aspects that make that tilt faking work is using higher perspectives...
Pretty good example here: http://vimeo.com/9679622
"I was lucky to have friends, contacts and a some helpful people I'd never met but asked nicely allow me access to rooftops and balconies"
I know you're after the opposite - but it just serves to prove the point I guess. For examples of what you're after just watch any effects heavy film from the 70's and 80's (they've been doing it since day one almost, but this particular era is the most laden) - and chuck in Kubricks 2001 for sure