Inside the Marriott Spring Hill if you just need the typical snacks or toiletries. If you're driving exit out the back of the hotel which runs over into the Holiday Inn (has good cinnamon rolls) parting lot (since you can't turn left on Kellogg) this will allow you to take Irving Street which is a dirt road for very short jaunt and you will find yourself in the back portion of the Marriott parking lot, you do not have to be a Marriott guest to buy things from there. Gas is available in the Sam Club parking lot on the other side of Kellogg. Also as a suggestion make a trip down to the Marriott in the morning around 8:30 and take advantage of their insanely nice breakfast. It's by far the best in Wichita. If you're worried about the staff saying anything just pretend to be def or something.
I'm not familiar with the area
There's a Quik Trip at maple and west street and a Kwik Shop at maple and Tracy street. Those are the closest.
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