Abstract: A collapsible trailer apparatus and methods of use and more particularly to a boat trailer having a boat storage space below a rigid frame. The boat trailer may also be collapsible and can be used to transport boats of varying sizes and shapes between lakes and camps without the need to empty the boat of any contents. The collapsible boat trailer can be broken down into a plurality of smaller components that are readily stored and transported. The present invention also particularly pertains to a boat trailer apparatus which may be collapsible and which is uniquely suited for short distance motorized vehicle towing. The collapsible boat trailer apparatus can be quickly disassembled without the use of bulky and/or numerous tools into lightweight sub-components for convenient storage and transport.