If you cannot get a tent/carbon filter setup and do it securely indoors, then just hang dry the crop outdoors on site. Your putting way too much thought/worry into this IMO and making it far more complicated than it needs to be. Do not need a shelter of any type, as it will only restrict airflow and cause more harm than good.
Hang a line between trees in an area that will get plenty of good circulation but will not be in direct sunlight. For a quicker dry, chop plants up and hang individual branches (making sure they do not touch).