GHAGAFAP Trivia on the Nith

GHAGAFAP, which stands for Golden Horseshoe Area Geocachers And Friends Annual Picnic, is an annual event of hundreds of geocachers from the area and around the world.
How well do you know GHAGAFAP? Gustov, the GHAGAFAP mascot, has come up with some simple trivia questions about GHAGAFAP over the years dating back to 2002 when the first one took place. Gustov decided to take his kayak out on the Nith river and placed a number of caches along the river for your enjoyment.
On the cache listing for GHAGAFAP 13, there are a numbers of balloons shown, including 2 yellow baloons. One yellow balloon has a smily face, what does it say on the other yellow ballon?
K--- G----
You can validate your puzzle solution with
certitude.
This section of Nith River is about 6.5km long and has a leisurely flow to it.
Put In: N43 16.235 W80 31.173 (Blenheim Rd)
Take Out: N43 14.520 W80 30.466 (Blenheim Rd)