Mike- the Stan Jones map is good because it includes short blurbs about great places to see on the Lake. It is not a great navigation tool. The Park Service map of Glen Canyon is worthwhile too. You can get a copy when you visit or might be able to access one at the Glen Canyon NPS web site (just Google it). Like the Jones map, it does not include bathymetic data. If you have an iTouch or IPad, check out the app called Topo Maps and download the relevant maps as these have both bathymetric and terrain elevations. If not you might have to get paper copies of those you need at your local USGS map retailer or online. Look for the "Page" quad and work your way uplake from there. If you have a chartplotter or iPad consider getting one of the Navionics brand charts or apps. In any event, watch your depthfinder and stay well in the center of the main channel when possible at Powell. There are plenty of hidden rocks, depending on water level. I wish I could post all my waypoints for the Lake - including all the sometimes underwater, sometimes above water hazards. June is a great time to enjoy the Lake. Have fun!