The prime choice for tenters (no RVs allowed) is
Robert Service Campground (South Access Rd., 867/668-3721, www.robertservicecampground.com [1], mid-May–Sept., $18), a two-kilometer (1.2-mile) drive or 20-minute walk south of town along the Millennium Trail. It has a small store and café, showers, and free firewood.
Government-run Wolf Creek Campground ($14), 11 kilometers (6.8 miles) south of Whitehorse [2] along the Alaska Highway, has campsites for tents and RVs (but no hookups), a nature trail, water, outhouses, and cooking shelters.
Near the south entrance to town, Hi Country RV Park (91357 Alaska Hwy., 867/667-7445 or 877/458-3806, www.hicountryrvyukon.com [3], tents $16, hookups $25–33) is one of a half-dozen private campgrounds spread along the Alaska Highway within a five-minute drive of downtown. It has 130 sites spread among the trees, modern shower facilities, a laundry, RV wash, dump station, wireless Internet, and convenience store.
Farther south, Pioneer RV Park (91091 Alaska Hwy., 867/668-5944, www.pioneer-rv-park.com [4], May–Sept., tents $15, hookups $22–28) has a similar setting as well as an on-site mechanic, discounted fuel for guests, and wireless Internet access.
Links:
[1] http://www.robertservicecampground.com
[2] http://www.moon.com/destinations/western-canada/yukon/whitehorse
[3] http://www.hicountryrvyukon.com
[4] http://www.pioneer-rv-park.com