Thanks for looking around, Megan. I've found out that a comprehensive campground listing or guide does not exist. I drove to Leavenworth a couple days ago and went to their visitor center. Got 3 other campgrounds tha I had not found online. I've said it before, but I even google our valley, and less than half show up on the listings.
So- having said all that...
I'm making the call!
SUN LAKES RESORT (edit, I typed sun banks, but it's Sun Lakes! thanks scovie~)
AUGUST 16-17-18
Check out the resort, it has a lot of fun activities, pool, lake, etc.... If you look at the site map, we will probably be in the most upper-right loop. I'll post more when I'm back on the laptop, not the tablet. They also have cabins and mobile homes for those so inclined. They do not have a picnic shelter group setting, but we can set up our own area withinourcampsite.
They start processing reservations Feb 1st. (this is subject to revision, but) A deposit of one nights rental is required when making the reservation. You can cancel up to 2 weeks ahead of the date. We can pool our reservations, and one person can call in on Day1 and then each party has 2 weeks to call them to pay for their depost.
We stayed in one of the rustic cabins a couple years ago. The pool is good-sized, theres lots of grass and trees, it'll be hot, and we'll have fun! Oh, and Rumour Has It....we'll be hosting some airline travelers, so the vicinity to Spokane International is much better.