We've driven by this park SO many times driving from the Willamette Valley to Central Oregon.  Being right next to the highway we've never really considered it as a "get-away" place.  However, we found a spot to camp (lake-side no less) in late April.  Beautiful weather and the busiest weekend that time of year, as there was a fishing tournament happening.  The sites were full but it never felt crowded.  The lake was low, but it gave us a lot of space to roam.  We thoroughly enjoyed our stay.  We even booked a couple of extra nights.  Moved our site to do so, but the campground emptied out the last two nights and it was great!  We were also happy to support the local business after the 2020 fires.