You're right, it's a total nightmare from a new comers perspective, however, the hotel is an existing client and they haven't really got too many options.
Regarding liability, not an issue. I feel common sense and some combined input of experiences will go a long way to an effective deployment. I have read some very detailed insightfull replies to threads by regular forum members.
Vehichles have both a speed hump and a boom gate as physical barriers and also men with large, fully automatic weapons to encourage correct positioning and movement over cameras.
I have considered the issue of varying heights of different vehichles and will wait to see what suggestions are forthcoming regarding hardware and positioning below ground.
I appreciate your input Tweak'e.
Many thanks ,
Bulana