Lake Powell trip ?'s (local to Utah)

I posted this in the find a 3rd, northern utah thread but havent gotten a response so i thought i would throw it up here.

I was hoping to get some advice from you experienced Lake Powell visitors. I live in Salt Lake. Our big yearly boating trip has usually been down to lake mead and we stay in mesquite, NV at a time share condo. Lately we have just been going to the st. george lakes because mead is so low and the beaches are terrible.

I have been wanting to plan a Powell trip for my family and stay in a house boat. I have noticed most of the listings on KSL are for buying into a houseboat share. I was wondering if people ever sale their time or if i am just better off going through one of the rental places.

I thought being local to utah i might have more options to buy an un-used week but i wasnt sure if that is ever a possibility. This would be for a trip in 2016. Thank you.