If calling for a blocked room, mention “swim meet.”
Kelly Inn - Best Western - 605-665-2906
35 rooms until June 17. Between $175-$185
Yankton Inn - 605-665-6510
25 rooms - Cannot guarantee how long they will be held - $89
Comfort Inn - 605-689-3400
Not willing to block rooms but they still have some available.
The Days Inn and Holiday Inn Express & Suites are currently sold out for that weekend, but it wouldn’t hurt to check.
Also, check with camping sites, KOA and bread and breakfast sites.
I recommend booking quickly. If you cannot secure a room, check back often.