Danna,
The best source book on hot springs for your trip would be: HOT SPRINGS of WESTERN CANADA by Glenn Woodsworth published by Gordon Soules Book Publishers West Vancouver and Seattle.  This book covers many "wild" and developed hot springs in B.C. as well as Alberta, Washington and Alaska.  The book includes maps and descriptions of many hot springs.  We have visited some of these springs with our Westfalia (RVC).
Hope this helps.
George
"85 Westfalia