Your question is shared with Outlaw owners...which has an identical chassis (height above ground) just a different shaped ramp.
Yes, the front leveling jacks can be dropped to lower the garage ramp. Just be careful not to over-extend the jacks or allow deflection on uneven ground that could bend a mount.
But, you really don't need to lower the tail...here's a trick for unloading...with the bike's engine off, and gearbox in first...keep both feet on the ground and use the clutch lever and front brake lever (hand controls) to engage the clutch and front wheel brake to control the descent.
Yes, the hand controls are opposite to engage (brake is in, clutch is out), but is easy to master with a little practice.
Congrats on the Canyon Star, and if interested, please share about it here:
Class "A" Toyhaulers
Kim and Steve, Mustang LCDR (Ret), '07 Damon Outlaw #1193
I have seen gross intolerance shown in support of tolerance, Samuel Coleridge
WE LOVE OUR OUTLAW RV