Jim, I found that campground and it is just perfect!

We will be leaving on Friday night and getting a few hour down the road. It won't be too hot to sleep in our TT at night up here.
Our first night camping will be at South of the Border. That is 467 miles from out house but it will be an easy drive for DH (who used to drive truck and does not stop unless it is for fuel)

since he will probably do half of that Friday night.
We can get up and do a leisurely drive to St. Augustine that is only another 300 miles.
That will leave us 122 miles to Disney on Monday morning. We can't get there too early because check in isn't until 1:00.
Thanks a lot for that info!
marybrat, did you check your mileage?
That looks like a long way for the first day! It is none of my business but I don't want you got get overwhelmed the first day!