Will designation result in restricted boating access?

Generally, no. Restrictions on public boating access and the implementation of entry permit systems (rationing and/or allocation) are not usually related to designation. Limitations on boating usually relate to the amount of use and/or types of user. Those rivers with use levels or types of use beyond acceptable limits (i.e., resulting in impacts to the values) may necessitate restricted access regardless of designation.

Source
Interagency Wild & Scenic Rivers Council