Oscoda, the AuSable river flows right through Oscoda. We were there last week and my granddaughter & grandson caught Walleye, Smallmouth, & Largemouth casting from shore. They are age 8 & 10. Go right at the mouth and cast crawlers bouncing bottom. Lots of Smallies in the river. Also behind Gilberts Pharmacy there is a spot on the river with a place to fish. Caught several smallies & 2 Walleyes there. Hope this helps. Wellman's Bait across the river will give you good information. Go to the Soo Locks, in the UP, that is a pretty cool place. The Big Mac Bridge is also cool. You are right, 5 days is not enough, enjoy. We will be at Cheboygan fishing Salmon & Lake Trout next week.