The answer to this question depends on how much mulch you need and how many bags of mulch you can fit in your vehicle.
If you plan on mulching large parts of your yard, it might be better to calculate exactly how many cubic feet of mulch you need.
You can often get a better deal on bulk mulch from a local supplier than you can by buying individual bags from the store.
In order to get a drop-off of mulch, you will need a spot on your property for the truck to leave it.