We just bought a great used bass boat; and are getting back in the sport after 20+ years! I've got a REALLY STUPID NOVICE question.... Our boat trailer has rails - not the rollers of the 70's. Are you supposed to drive/motor on/off of it vs. push it off or crank it up? Isn't that risky with the motor down; possible shallow water? We decided we needed to camp out at a launch and watch some more experienced boaters to learn today's techniques. Yikes! Feel pretty stupid! Any suggestions???