Class II in a canoe? To quote Homer Simpson "Woo-hoo!" The White River has to be one of the best easy river experiences in Utah. The river meanders over 90 miles from it's source to its confluence with the Green River. This 34 mile section offers a great weekend trip. The scenery on the river consists of a wild, deep canyon with plentiful cottonwoods and birds dotting the rivers edge. This is in stark contrast with the mesa tops above. On the mesa top, out of sight for the most of the float, the landscape is dotted with dozens, if not hundreds of oil wells. It is a striking contrast.
Given the remote location, this is a good float for beginners with competent leadership, or those with a little experience. It can be floated at 300 CFS or greater, but I would recommend 700+ for an easier float. It is also done in rafts at levels above 500 CFS, but I would strongly recommend 1000+ for a raft. Be aware this is a wild and natural river, so does have the potential for logs blocking some or all of the channel. Rafts, in particular, may have difficulty in a few log jam prone spots. Above 2000 CFS may require intermediate canoe skills.
This is commonly done in 2 days, but if you are ambitious about getting side hikes in, plan on 3. At 700 CFS, our total float time was around 12 hours over 2 days, and didn't offer much extra time for hiking by the time we setup the shuttle. The area above the river is sparsely vegetated, and relatively easy hiking. There are as many side hiking possibilities as ambition allows.
Note: The White River does not currently require permits. Please do, however, practice low impact camping practices. Use a fire pan if having fires, and a portable toilet system is recommended. Camp on gravel bars and other low vegetation areas to reduce impacts. Using low impact camping techniques will reduce the likelihood for more stringent regulations in the near future.
Warning: Horseflies and mosquitoes can be an overwhelming problem. Be sure to have repellant and long sleeves/pants. Early spring can be the best time to float, before the bugs come out.