I just started reading some journals by a hiker named Nimblewill Nomad. Read his 1998 Odysey and that can give you a good idea of what to expect. Of course, the data is 10 years old but I think a lot of it is still relevant. You can also check out Trailjournals.com and find various journals through Florida, the AT, the Benton MacKaye, the Pinhoti and various other trails.
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If you think you can, you can. If you think you can't, you can't. Either way, you're right.