So how much does your Skamper weigh, loaded? And what is your new "big kid toy"? By "power brakes" I presume you mean a brake controller connection for electric trailer brakes
. Sorry to hear about your ongoing transmission woes with the Saturn.
My family traveled all over North America in a Skamper tent trailer back in the 70's. I think ours was a 1971. Fairly large (slept up to 8) and heavy. We pulled it with a 1968 Dodge Coronet wagon, followed by a 1976 Olds Cutlass wagon, both V8's. Plenty of power, but we had to beef up the rear suspensions to handle the tongue weight
(and six of us in the vehicle). Good times!