Houseboat Rates
Not sure exactly what Bigprairie's last question is, but I think it was about size. Powell is over 100 miles long, but you can't really think like that. The multiple canyons etc. means miles and miles of shoreline, coves and slot canyons etc. Lake Mead "feels" bigger and actually holds more water as Mead has huge and deep basins. Powell is much more compressed. All of the features are right on top of you and the biggest basin (Padre Bay) is actually kinda small by Mead standards. Google Earth is a great way to "see" it. Use the tools in the upper right to tilt the pictures and you can get a feel for the depth of the canyons. I used it to help me find beaches for the Houseboats. It turned out to be the best tool I used and two of our spots I "found" by searching there . . .
The last thing I should mention is that Houseboating is somewhat of a working vacation. I find it relaxing just the same, but there are anchors to set, boats to tie up, little things that need fixing etc. For this group it would be obvious, but we have friends that won't go with us anymore as they would prefer to be in a Hotel and being served etc. Nothing wrong with that, but definitely not the same thing. Also, the group you choose is very important. We were really good this trip and have been in the past, but I could see a couple of bad eggs ruining a whole week

This was probably our 10th time Houseboating, but first on Powell. Experience helps a lot, but I can say we should've been going here. Mead and Shasta are great, but they simply do not compare with the possible exception of boating in the Grand Canyon when Mead's level makes that a reasonable venture . . .