clutch squeal when loaded

When I'm on a hill in traffic and have to fast clutch or when trying to pull out in a tight gap in traffic and have to fast accellerate I get an initial squeal sound similar to the tires slipping, but they aren't. This happens most often when it is cold, wet or when my bed is loaded. My clutch engage point is almost at full release of the pedal. This has become more pronounced during the last 10K miles. I have 30K on the truck new and wondering if anyone else has experienced this. I don't think my clutch is slipping cause if I want to spin my tires on pavement I can and all gears seem to function well.

 

my truck makes a noise too but when i push on the clutch it goes away and then slowly comes back again just started doing that yesterday