This is not the shortest route, but the easiest. Because of the time of the year and possible weather problems consider:
1. Leave Nappanee on Route 6 east. You can fill up at Martins grocery on the east side of Nappanee or wait about 8 miles. You'll come to a traffic light intersection with a BP station on the right. There are truck pumps at this station. Continue on route 6 east to route I 69.
2. Take I 69 south to Indianapolis I 465 south to route I 74 east.
3. Take I 74 east to Cincinnati and I 275.
4. Take I 275 to I 75 south.
5. If it is time to stop for the night, there is a nice CG at exit 171, in Kentucky. Oak Creek CG is the name. There is a Flying J at this exit.
6. Continue south on I 75 to Knoxville.
You have two choices depending on the weather. Go over the Smoky Mountains or around them.
Going over the Smokies"
7. I 40 east over the mountains to I 26 east in Ashville.
8. I 26 east to I 95 in South Carolina.
9. I 95 South to Jacksonville.
Going around the Smokies:
10. I 75 south to Macon
11a. I 16 east to I 95 at Savannah.
11b. I 75 south to I 10 east.
11a or 11b is your choice.
12. I 95 south to Jacksonville
I've been to Camp Newmar many times and have taken both these routes. Each has its' advantages. If you go around the mountains, time your travel through Atlanta during mid day or late evening and you should be fine. While this may officially be the correct place to post this question, consider posting in the Newmar Owners forum and the answers you receive will be what you are looking for. We understand the coach you will be driving and will help, a fellow Newmar owner, any way we can.
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