If they are drawing comb on feed that's great. If they stop drawing comb and keep taking feed, make sure they aren't filling the brood nest with nectar. I hope you do need another super before fall and that you can keep them drawing comb. You'll definitely need the comb next year.

I've read a 3 mile feeding radius is normal, however our shop is right at 2 miles, as the bee flies, from our farm and I rarely if ever see a honeybee there feeding on the clover. I figure they fly as far as they have to, to get nectar and pollen.

If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land. 2 Chronicles 7:14