NF John Day from Mengs Canyon put in to Monument is still floatable in a raft toward the end of June in an average snow pack year, but starting to get skinny. I would recommend this for kids, the water is cold when still raftable so wetsuit would be needed for kids in IK.
Grande Ronde is also a great kid trip latter on when the water is nice and warm in latter July. Hit it in the 1000 to 1500 range for good kid IK flow and bathtub swimmin water.
Send a PM if you want detailed info with the eye for kid planning on these runs, we take our neices on these.
Kids generally take better to groovers than adults do on their first trip.
We'll probably be on the GR in july post July 4th, with an upper upper minam horse pack-in Ik decent either before or after depending on snow pack, and again in mid-august for GR IK trip.
been going on the NF JD last few years in June, but this year will be upper upper Owyhee ELF IK trip followed by Alaska latter in June.
Some representative photos of NF JD and GR at low water (great kid time of year)