Trailers, excluding boat and construction trailers, used for storage (but not including loading or unloading operations) or sale of goods or merchandise or in which commercial or professional services are rendered for a period not exceeding two months. No more than one extension for reasons of hardship may be granted, except that applications for 30 days or less may be made directly to the Township Committee without payment of fees and without a showing of hardship where the granting of such application would not be detrimental to interests of the public or in conflict with the Master Plan.