We combed through Trip Advisor, RV Park Reviews, and campgrounds' own review pages to find under-the-radar destinations in every state that may offer last-minute availability in high season.
Discounts for seniors, military, and Good Sam RV Club members are common, as are extra fees for more than two adults and children.
It's a good idea to call ahead or make a reservation and confirm that open sites suit your RV.
Stop by Anchors Aweigh RV Resort in South Foley for a retreat on the Gulf Coast.
There's also a beach, picnic area, and off-leash dog park.
One reviewer was thrilled to have snagged a last-minute booking.
Grassy Pond Fam Camp in Lake Park is a former military camp now open to the public for tent and RV camping and cabin stays.
Guests are happy with the free shuttle to nearby casinos and the well-maintained grassy spaces, as well as a free year-round heated pool and seasonal activities, such as movie nights.Rates start at a night, including electric and water hookups.Resident senior citizens receive a 50 percent discount.Haines Hitch Up RV Park in Haines draws high marks from guests, who report that the campground is spotless and convenient to downtown restaurants.Amenities include laundry, showers, restroom, and free Wi-Fi; cable is available at some sites. The Grand Canyon Railway RV Park in Williams is a little less than an hour's drive from the Grand Canyon.Malakekahana State Recreation Area on Oahu's North Shore, famed for its beauty and great surf, offers access to outdoor beach shower and toilet facilities, picnic tables, water spouts, and fire pits for .41 nightly for each person. Farragut State Park in Athol offers a touch of history with a camping experience.The grounds are a former naval training base that was active during World War II.The compound features a pool, hot tub, grill pits, hot showers, restrooms, and onsite laundry. All sites include electric, water, sewer, Wi-Fi, and cable.Campers say the resort is ideally located near beaches, shopping, and restaurants.Reviews say the area is quiet, and one visitor enjoyed the opportunity to choose from among several open sites. There are very few RV parks in Hawaii -- after all, how would anyone but a local drive there?But visitors who decide to rent an RV while staying on one of the islands will find options.