I live right next to Mill Creek and fish it often.

IMO, this time of year most of the lake is unfishable on the weekends between 10 AM and 5pm due to pleasure boaters. There is a no-wake zone around and to the north of the ramp that you could fish later in the day. The other no wake zones to the south are usually packed with swimmers and anchored up pontoon boats on the weekends.

Other than the dock at the boat ramp and the campground, all the docks on the lake are private. There's nothing against fishing around the private docks from a boat, though I have had the owners give me the stink eye from time to time.

Launching by yourself is no issue. There is a dock by the ramp with a couple dozen spots to tie up, and the ramp has 4 lanes so no issue leaving your truck for a minute while you deal with the boat.