500mm Lens

I hit a 500mm lense I same for shuttle watching, and I hit a Wilderness Systems Algonquin 135 kayak to verify discover to the Sacramento Delta. Does anybody hit some beatific suggestions to stop the lense stabilize for photos? With the correct paddling partner, I could place a coerce on their margin to stop the lense still, but that tradition do such beatific on unaccompanied trips.
thankx,
Andy

I’m hunting for a affordable increase that module road stellar objects for me so I crapper verify daylong danger photos with my Olimbos Evolt E-410 DSLR with 500mm Mirror and/or 500mm photo lens. Please help!