www.mantecatrailer.com or call us 877-289-1274. Manteca Trailer & Camper, Inc. has grown into the largest and most efficient of all Northern California RV Dealers. We have the experience, initiative and financial backing to provide our customers with the best price, service, selection and quality. Residents of Concord, CA come to Manteca Trailer for the largest selection of new and used RVs. Bring us your used RV and we will sell it for you!