Annuals might not matter as much. But, the clover keep an eye out for what variety you are getting. I am eyeing picking up peddington patriot white clover. Folks seem to like durana on here from them, but I am putting it in hardiness zone 3A, so they recommend using patriot instead. Oddly enough a 25lb bag is cheapest through amazon for patriot.
Hancock and seedworld has treated me well. Tractor supply has done ok by me too. They have a K31 5lb bag of red and white clover for $22. Not sure exactly whats in it, but it was sold out when I got there over the weekend.