While the engine and drivetrain are capable enough, the Blazer/Jimmy platform has too short a wheelbase for stable towing. The same thing that makes them good in hard to get to places, is the same thing you need to avoid. I towed an Argosy 20 with an Astro van for a while, maybe you can get a standard length Astro with the 4 wheel drive option. Same running gear as the Blazer, but a bit more stable for towing.
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.