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Welcome to Grand Am RV Sales, Service and Rental Center! We are the premier Motorhome RV Sales & Rental Dealership on Long Island. Get your RV Motorhome and Trailer accessories from Grand Am RV Sales and Rentals. Our Service and Parts Accessories Center is conveniently located in Mastic Beach,NY close to the beach and many campgrounds in the Suffolk County area. We have a complete line of RVs, Motorhomes, Travel Trailers, Toy Haulers, and Cargo Trailers by the best Manufacturers in the country. Our Showroom is located in scenic Calverton,NY in Suffolk County. Come pay us a visit with your friends and family before you buy your next RV or Travel Trailer... we offer the best prices on Long Island.