Obese elderly gentleman's preferred entry point; makes squirrels all sooty; hot!

We travel in a single line, across the shifting land, With heavy loads upon our backs, bound by a unseen strand. No track of steel guides where we tread, no engine makes us roar, Yet through the sea of golden dust, we reach the distant shore. We carry riches, silk, and spice through wind and scorching heat, And only when the sun goes down do all our shadows meet.

Expressive Creation with Phallic Symbolism?

Found in submersible vehicles, i can give you a sneak peek above the waves. With proper helmsmanship, also keep you from your watery graves!

My first two are abbreviation for the sunshine state And if you're on my middle three, the law you must escape My last two and myself and I would make a lonely date But really I am tongue that flickers, licks, but none can sate