This is a good early season hike while its still rainy in Seattle it can easily be sunny and warm on the other side of the mountains. There are at least 5 good campsites at the lakes that will each hold multiple tents no problem. Some people do light fires but I’d like to discourage it, fire danger is pretty real in these scrublands. This is a very pretty hike full of sage brush and interesting geological features, also several waterfalls. Past the lakes you can go out to the Columbia River Gorge. Check out the WTA description for more details. Note that there is no potable water, you have to haul it it. The lakes are contaminated by irrigation run off. 

WTA Ancient Lakes