In my opinion, having been there many times, E is the best section. Of course individual tastes vary. If you had to reserve a section in advance, I'd ask for E.
Good lake view, close to the bath house and close to the pavillion and tennis courts.
Sherrie
ps.
Skynerd is not in the Jam lineup this year

so it looks like we will probably make it to Guntersville after all. Would like to see Bo Bice, though!