I would think there were at least a couple of ways to dispose of a body in that area. A weighted body taken far enough out to sea wouldn't be seen again. A body placed in a bin would be gone the following day as I understand it.
Which scenario are you working through?
Amaral's scenario was that Madeleine died accidentally on 3 May 2007, probably around Gerry's visit, and then was discovered, presumably by Kate at 10pm.
This gives Kate (not Gerry) mere minutes to work out the method of disposal of a body and to implement it.
No, body placed in a bin does NOT work. I was not impressed by the checks on bins which took place, from memory on the Monday following the incident. So I followed up what happens to the refuse. It goes to a central site at Porto de Lagos (which is nowhere near Lagos). At that site it is picked through in detail to strip out toxic waste that cannot go into landfill. The 2007 figures for Portugal and the Algarve show the site was working perfectly.
The weakness of the front end checks, in Luz, at
https://shininginluz.wordpress.com/2014/11/05/body-disposal-the-wheelie-bins-prosecution-case/The strength of the rear end check, in Porto de Lagos at
https://shininginluz.wordpress.com/2014/11/11/body-disposal-the-wheelie-bins-defence-case/ Feel free to cut and paste from the articles, criticise or whatever.
It is EXTREMELY unlikely that Madeleine ended up in a wheelie bin in the western Algarve.
I cannot give a view on other locations.
The following is both off-topic and possibly inflammatory, and I have to say I have NOT researched this in any detail. In the Cipriano case, body disposal was by putting the body (dismembered?) into a fridge, placing the fridge in the rear or boot of a car, driving said car to Spain to an undisclosed car disposal site, and having the car crushed. (Hopefully, I have got the gist right, if not the detail.)
I am not interested in the Cipriano case. If YOU are, you may wish to look up how scrap cars had to be treated in Spain at the time, and how refrigerators had to be disposed of in Spain at the time. On a believability scale of 0 to 10, this tale is screaming a perfect zero at me, but hey, I have been wrong many a time before.