Whether you plan to camp in the U.S. or travel abroad this summer, the Reference and User Services Association has named these best free reference websites:

Woodall’s North American Campground Directory: This website — http://www.woodalls.com/ — also known as Good Sam RV Travel Guide and Directory,  features descriptions and ratings of campgrounds, emphasizing travel by recreational vehicles. Facilities rated include RV parks, resorts and rentals in addition to private tent campgrounds.

This is an excellent resource for families or retirees planning vacations or extended winter travel. Each entry has detailed information about the facility, sites, nearby recreation and other amenities. It also includes National Forest and National Park campgrounds, and detailed information about fees and facilities.

Travelers’ Health: The Centers for Disease Control and Prevention’s website — wwwnc.cdc.gov/travel — provides information and health recommendations for U.S. residents planning to travel abroad. It helps travelers understand risks involved with traveling to certain parts of the world.

Visitors select the country they want to travel to, and options about their health or whom they’re traveling with, and the site generates a customized report with need-to-know information.

The report includes health warnings that may be issued for that country, information about diseases of concern, and precautions to take before or during their travel.

There are also educational sections on how to keep safe while in the country, and there’s a packing list to recommend what to bring on your trip.