If I am going to a destination for a certain event I will make reservations well in advance.
If I am on a trip consisting of many overnight stops I usually don't make reservations but I may phone the campground of choice an hour or so ahead of our expected arrival. These trips are usually planned as we go and our destinations often are not known until only a day or two in advance.
Holiday weekends or mid summer trips in busy areas may be exceptions and we may make reservations a day or so in advance. It all depends.
If all else fails, there's always a Walmart.
