A lot has to do with how you do your rehab, and what caused the dislocation in the first place. I dislocated my shoulder in 2007 while kayaking. I took the rest of that spring and all summer off from kayaking and guiding, to ensure I let it heal correctly while doing my daily PT and weekly visits to rehab. I was back guiding 16ft paddle boats in late August and kayaking at the class IV/V level that October. I am still paddling, guiding and rowing 7 years later without surgery.
Bottom line, find a good ortho and lay out your lifestyle to them so they can accurately, (as accurately as they can) prescribe you with a thorough rehab plan to get you back out there doing what you want/love.