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Triple M Trailers

Triple M Trailers

903-340-6533 Send Email Website

William A. McKinley, Inc. is a second generation, family owned and operated trailer dealership in Texas. We do business as (d.b.a.) Sundowner Trailers of Texas and Triple M Trailers of Texas.

Since 1981 we have sold and serviced horse trailers, stock trailers, living quarter trailers, utility trailers, equipment trailers, custom trailers, used trailers, and truck beds. We have diversified over the past several years to also include the sales of toy hauler trailers, motorsports trailers, cargo trailers, dump trailers, and sport utility trailers.

Our founder, Bill McKinley, chose years ago to offer the best trailers in the market as measured by strength, safety, ease of operation, cosmetics, manufacturer support, and price. In addition to Sundowner, Lakota, Signature Quarters, CM, and Big Tex, we have been a dealer for other brands that include names such as Wells Cargo, Featherlite, Exiss, Sooner, 4 Star, Logan Coach, Hart, Outlaw Conversions, Continental Cargo, J&I Mfg., S&H Trailers, SportChassis, and more.

Our 10 acre trailer dealership is located on Interstate 20 in the Wills Point/ Myrtle Springs/ Canton, Texas area. We are about an hour east of Dallas/Fort Worth and a two hour drive west of Shreveport, LA. Our location in conveniently located at the Highway 64 exit for the Canton, Texas World Famous First Monday Trade Days.

We have a passion for what we do. We truly enjoy offering solutions to our customers as needs arise. We don’t pursue ‘the sale’, we pursue ‘the relationship’. That’s the way it was done over 35 years ago, and that’s the way it is going to continue to be.

We are a company that supports employee growth. We understand that if we hire the right attitude, and then train the skill set, we will have the foundation for a company culture that will carry on the torch and continually improve our ongoing mission of service. 


The McKinley Family members bring over 100 years combined experience and knowledge of the trailer industry to the daily operations. Combine this expertise with the knowledge of our trained employee family, and one can feel confidence and find comfort in knowing we should be able to meet any trailer related need that he or she has.

Sundowner Trailers of Texas is the ORIGINAL and LONGEST OPERATING Sundowner Trailer Dealer on the planet. In fact, in celebration of Bill McKinley’s 35th year in business, Sundowner collaborated with us to design and build an exclusive model to our dealership known as the Circuit Series.

Triple M Trailers of Texas holds the honor of being the LONGEST OPERATING Lakota Trailer Dealer in the industry. In addition to that, we are also the FIRST dealership to become a Lakota PREMIER DEALER.
As evidenced with these relationships, when we work with manufacturers who deliver a product that meets our specifications AND supports us in servicing our customers AFTER the sale….we stick with them!
Sundowner Trailers of Texas has had a seat on the NADA RV Book Advisory Board for over a decade.

We have been an active member of the NATDA (North American Trailer Dealer Association) since its inception.

Our Technicians are Dometic, Norcold, and Lippert Certified and trained.

Our Team is trained in DISC Personality Profile courses.

The ENTIRE TEAM tours the manufacturer plants and undergoes training and education offered by the various manufacturers we represent.

As featured in a chapter of Howard Partridge’s book, "Phenomenal Success Stories", and to quote the late, great Zig Ziglar, "You don’t build a business. You build the team, and the team builds the business." We consider our main product at the dealership our people. Our people consider our customers to be VIP family. We are here to serve.

The culture of our dealership sets us apart. This is driven by our people. When you choose Triple M Trailers of Texas, you will interact with team members who are not only qualified, but who maintain an attitude of "I’M RESPONSIBLE".


To provide the most EXTRA-ordinary experience one could have at a trailer dealership.


Honesty. Responsibility. Fairness. Gratitude. Integrity. Faith.


The purpose at William A. McKinley, Inc. is to provide employees, their families, and all guests with an environment that promotes dreaming, goal setting, and growing so that everyone has an opportunity to discover, stretch and reach their potentials …… and then some.

You can have everything in life you want, if you will just help enough other people get what they want.” -Zig Ziglar



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Wills Point, TX