OP, I have to strongly encourage you to NOT try walking on to an "easy" D1 school. The only way I can recommend it is if you don't really care about improving or taking running seriously. And if you care at all about academics, definitely think more about a D3 school.
Why do I have a right to suggest this? I made the very mistake you are about to make. I walked onto a very weak D1 program with times that gave me no business running D1. My high school PRs were 16:41 5k, 9:57 3200 and 4:38 1600. I made the top 7, but I got SMOKED at the big meets. I finished no better than middle of the pack in smaller races. I lasted one year and quit running for 6 years after that. I was training with guys who were so much faster than I was and I was pushing too hard on recovery days just to run with the team. The academics were nothing to write home about either.
With that said, are there D1 schools that would take you? Yes. A ton of posters here think you NEED to run 9:30 and sub 16 to have a shot, but that is just if you want to run for a mediocre or semi respectable team (as a walk on). There are actually some D1 teams out there that are embarrassingly slow, but would you really thrive there?
If this hasn't changed your mind, here are a list of terribly slow D1 schools out there that would take you (just off the top of my head):
Tennessee State University (I would venture to guess that this is the slowest D1 team in the nation)
Robert Morris (A guy I went to HS with never made our top 7 and was in RMU's top 7 by his jr year....he never broke mid 18s in HS)
Wofford
Seton Hall
Tennessee Tech
Evansville
Presbyterian College