Do a search for Sanke fermenters in this forum for more information, but basically... Slow and Low that is the Tempo!!! If you are using a Sanke "as is" with the dip tube assembly in place, just go slow. You will pick up a little sediment initially, but not much. I cut my dip tube and wish I hadn't now. The initial yeast that makes it into your serving keg is minimal and will get sucked into the first couple of pints, providing you aren't moving the keg around restirring it after tapping it. If you move it, be prepared for a few more dusty pints until it pours clear again.
It is very easy, and like RiverCityBrewer was saying; an orange carboy cap and a plastic dip tube work just fine as well. It is as hard or easy as you want to make it. It is second nature to me now, and I pressure ferment and everything. Yeast getting stirred up in my technique is still minimal into the serving keg, and my beer is carbonated....
I wish I hadn't cut my dip tube due to yeast harvesting. If I had left it alone, I would get a lot more after adding my wash water after a fermentation.
Cleaning a Sanke is the same as cleaning a carboy, you just can't see it to inspect it. Use Oxy or PBW and don't worry. If you are a worry wort, like me, clean it twice. After you use a Sanke once, I bet you are hooked.:rockin: Seriously though, do a search as there is a ton of info on here and I just summed it up.