Which manure?

OK, I've made a decision to buy local, and to practice organic gardening. Not always easy choices!

I know there is free horse manure at many places locally, including riding stables, racetracks, and boarding stables.

But I don't have any way to haul it! I've considered getting a hitch put on my little Aztec and buying a used trailer, suitable for hauling manure. Cost will probably be at least $1000 to do this.

This morning I went to Meijers and bought 20 bags of composted cow manure. Noticed it was from Indiana. Long way to haul manure, plus the bags aren't readily recyclable. Total cost was $30. But the cost of shipping them here was probably distributed over 50 tons of manure.

Which is the better choice for the planet? Am I over-analyzing this?

Later I decided to take old garbage cans to get some of the free horse manure. Couldn't lift the cans after I filled them, had to call my daughter and her fiance to come and rescue me! Lucky it was close to their house so it wasn't a lot of extra gas for them. LOL... I was at least able to get them out of the car on my own.