If hired, I'd be one of the first new guys. I'd expect they wouldn't hire new people if they had no demand for them. Worst case senairo, I work 3 days a week (Thursday-Saturday) during the summer months. Then kill it September-January.
Wrong.
Worst case, and most likely;
-You work every Saturday 14 hours a day and no days M-friend.
-They will make sure you don't make seniority by letting you go before you have 30 paid days.
-They start working you during the "free period" so you never make seniority.
-You injure yourself (disk injuries are common) because you think you can muscle thorough the job.
Best case, and least likely;
-You have the mental and emotional grit to endure constant harassment and mind games (guys who were emotionally or mentally abused do best)
-You luck into a situation where they need more than just Saturday drivers (who they pretend are full time).
-You manage to avoid cracking a mirror or running over a hose connector etc. for 30 strait work days.
Good luck to you. Use your knowledge of proper movement and lifting so you only end up with broken down joints, and not herniated disks, at retirement.