Its quite simple... the upper end is somewhat more shallow and has much more color to the water therefore warms faster and holds temps better than say.. Richland where it stays more clear and cool with less runoff. You say you "Hated the mid lake up because of the dreaded crappie fishermen".... well don't expect much response or help from these old school or dreaded crappie fishermen on here as you call them lol. Im a long time bass fisherman myself but I grew up in a crappie boat from two generations of "Crappie Fishermen" and I'm here to tell ya.. I've seen way more dreaded BASS FISHERMEN than I will ever see crappie fishermen. I have too many times had to bite my tongue from guys blistering a rooster tail 30 yards from my rod tips only for them to then set the boat down right on top of the very spot where the fish are stacked. Just cause you paid Mr. Berry 160 bucks to enter a tournament doesn't mean your last name just became Oconee. Like you, I too have kids that would rather fish than eat as well had a bassboat that would run with the best of them and fished tournys but that never gave me anymore right to run all in someones spot. Just my two cents but as far as the lower end goes.. well its just like bass fishing.. it starts a little later on that end and is usually very clear so your jig colors need to go along with that but be prepared to catch lower numbers of fish too as the last few years hasn't been right but this year things are lookin a little better but I cant elaborate too much because I cant give up my reef numbers...ya know how it is