I guess that would all depend upon what time of day this van was normally seen in the vicinity
How would holidaymakers know what was normal routine for service personnel? I don't spend my time on holiday working out the operational circumstances of my accommodation and I don't know anyone who does.
Flight arrivals and departures can be delayed … so who would take note of a van used for transportation?
A catering vehicle parked near a catering outlet would probably excite no interest.
There were unoccupied flats in the block which were not checked; Madeleine could have been taken to one of those and taken out in a bundle of laundry to the laundry van at a suitable time.
We just do not know ... everything is a risky strategy ... but so is taking a child.
For example on the 7th May the GNR dogs showed interest as follows …
>>snip<<
At about 23.00 accompanied by a PJ inspector, the searches were begun.
After Rex was given the girl's clothing to sniff, he began to search on the ground floor of block 5 and when he passed the door of apartment 5 A (the place the girl had disappeared from) according to his handler, officer Fernandes, the dog altered its behaviour, sniffing with greater intensity than he had done before.
Apartment 5J of the same block was also checked as the dog had been more agitated than before as if there were a very strong strange odour there.
It was stated that this apartment had been unoccupied for some time.
Afterwards, the same kind of search was carried out using the dog Zarus which in general terms showed the same behaviour in the same places as Rex had done.
http://mccannpjfiles.co.uk/PJ/GNR_SNIFFER.htm