I have a 1981 Astroglass 15' bass/ski boat with a 85 evinrude. My only vehicle is a 2007 Impala. Can I tow this boat alright? Would there be any problems launching ad retrieving the boat from the boat ramp? I have no idea what the boat weighs or what the toungue weight would be. Can't find any information anywhere. I have a class II hitch. THe only one made for this car.