Fruit Tree Mulch Help

I want to plant some fruit trees next spring in my backyard and I was going to use some cedar mulch. Based on the area I would need to buy some 5 yards of the stuff which with delivery would be quite expensive and a pain to get to where it needs to go. I was looking through a hardware store site and saw that a 3 cuft straw mulch bag was advertising that it could cover 100sqft with a 2-3 inch thick layer. This seems like a lot, but was wondering if that was the case as I could get away with a few bags of straw instead of hauling 5 yards of cedar.

The way I got my 5 yards estimate was 360sqft area x 4in thick layer. I would end up using 6-8 bags of the straw instead which is about half the cost and much easier to apply for me.

I know that straw would decompose quicker but that’s fine as I’m going to get some ground cover plants in place once the trees get established.