The private ramp is north of the bridge on the gravel road. You are good there with a prop. Lots of traffic on the weekend. The next launch up river is public. I've only fished there once but I did it with my flat bottom and 25hp prop without many problems. There are some logs in the river you will need to look out for but that's pretty much any river.

Haven't crappie fished there but did catch a few bass about this time a year ago. Been thinking about heading back up that way...let us know how you do.