Proppant delivery systems and related methods

A method of transporting proppant to a wellsite that includes one or more wells, the method comprising:

• transporting a plurality of trailers to a proppant-loading site, each of the trailers comprising one or more containers;
• at the proppant-loading site, loading proppant into the container(s) of each of first and second ones of the trailers;
• forming a long combination vehicle that includes a truck and the first and second trailers at least by coupling:
• the first trailer to the truck;
• and
• the second trailer to the first trailer;
• and
• driving the long combination vehicle from the proppant-loading site to the wellsite after proppant is loaded into the container(s) of each of the first and second trailers at the proppant-loading site, wherein when the long combination vehicle drives from the proppant-loading site to the wellsite less than 1% of a distance that the long combination vehicle drives is on a public road.