vikefanman, there are many good shore fishing spots available on the st. croix. Unfortanetely you will have a hard time finding camping by one that doesn’t require a boat to get to. some of the best shorefishing takes place around hudson, stillwater, prescott, and the Kinni narrows.
However, you severley limit your camping options in these areas by not bringing a boat. You can camp on numerous I slands around Hudson and stillwater as well as the WI shoreline around the Kinni Inlet. Hope this helps!