There are many ways to make reservations for the parks you plan on visiting. Most campground directories list both phone numbers and mailing addresses. Generally, you will phone (perhaps they have a toll-free number) and find out about availability on the dates you are planning on traveling. This is a great time to get information on the park's amenities and ask any questions you have about the listings.
If the park accepts credit cards, you may be able to give your number over the phone. If they do not, you will need to mail payment. Payment usually needs to arrive within a specific time to guarantee the reservation. You should ask for confirmation that the payment has arrived.
You will also need to decide if you are going to make reservations for the entire stay or for just one night to see if it meets your expectations. If you are making reservations at a new campground, you may be hesitant to commit to a long stay. You will need to decide if you can risk not finding another park if it is a busy time of year.
Many RV parks now have a presence on the Internet. While some are just informational, some also have the ability to make reservations and take payment online. For RV owners who have embraced this technology, it is a very convenient option. It is also cost efficient for both the park owner and the traveler.
If you make reservations on the Internet, be sure to print out a hard copy of the confirmation. Many shopping carts on Web sites generate an e-mail confirmation that you can print out and save on your computer. This confirmation will help prevent problems when you arrive.