France share in Rhine Confederacy was 200.000 men.
But according to Sokolov (Le combat de deux empire), the regimental reports spied by the tsar agents showed that in 1810, most french troops were stationed in Italy, France or fighting in Spain. Only 46.000 men remained in all northern Germany, from Hamburg to Warsaw.
Not exactly the figure of an heavy occupation.
Later, the figure will grow with the preparation of the war against Russia - but only after 1811, when Russia shifted half of the Danube army to polish frontier, although the turkish war was far from won.