No. Rather I AM calling bull**** on anyone espousing throwing a brick, can of peaches or whatever from an aircraft in-flight, expecting to base their judgement of the surface suitability on the behavior of that object.
So am I. I already struggle with MTOW, a brick is out of the question. As for discarding food, forget it.
In this day and age the internet is your friend. Here you can scope an area from a satellite, look at weather, both historical and forecast, find out about tides and generally get some sort of picture at your leisure. If a salt pan is your thing, know about the moisture levels in the surrounds and stick as close to the edge as you can. IMHO there are far more fun places to land. Read, swimming, fishing, camping and a big fire at night.