If you avoid pine trees caterpillars shouldn't be a problem. Definitely keep dogs on leads, especially in the campo, because shooting is a favourite pastime and anything that moves is a target plus , although illegal, it is not unknown for poison to be set down.
Sand flies more prevelant inland and during the months March to October , dusk to dawn, and even though our dogs wear scalibar collars all year it is not 100% guarantee .
Vet practices more prolific than in UK and excellent.