When ya goin'?, follow me...
Casino row is like the 405 freeway at 5:00pm. Rental skis thick as flies. Taxi boats don't care about you, they have the right of way (so they think) There is not enough beach @ pioneer to chill without swamping the boat.
Head south past the 5 mph/harrahs area, and they mean 5 MPH. Bullhead Comm Park has a bunch of rentals there, too. 1/4 mile down is a huge wash that intersects the river, stay to the Nevada side, Its not a sand bar, its a rock bar.
Further south, there is an island on the AZ side, (River Mile 270), decent sandy beaches, some are a bit of gravel.
Laughlin Bay Marina is on the NV side about a mile down, and Big Bend a mile or so from that. Heading down river, stay center, or left of center to Big bend.
Beyond Big Bend, Keep right of 'The Bush" in the middle of the river. River sweeps left, and Boy scout camp/Pipeline are on the right.
Boy Scout Camp has a few beaches, as well as the few islands on the AZ aide. Pipeline kinda sucks, swift current and hard rock beach, and too shallow to deal with the current.
Further south, the channel is right of center, the AZ (left) side is shallow at this point. Lazy Harry's is on the left, turn by the flags (AZ Veterans Memorial Park) Watch for the shallow entrance, decent beach to park the boat, grab a burger and a beer. 
Rusty's marina is the next 'channel' further south, has a bait and beer shack. Iguana's (Mexican food) has a small dock maybe 2 skis and a boat's worth.
Beyond that, the channel is on/nearer the NV side. Rotary park, AZ side, home of BHC-PD boats...
This is usually far enough for me on a Wednesday afternoon cruise.
Watch/read the water levels http://www.usbr.gov/lc/region/g4000/hourly/DavisParkerSchedules.pdf
3 units minimum for me, been out in 2 
, but 4 is better, 5 is like a lake
Good luck and stay safe on the river
Dan'l
There's more-
Beyond rotary park, the channel switches sides to the AZ side- a big rock bar island on the NV side, cant miss it, look for the trees in the river...
Beyond that, stay to the AZ side for a 1/4-1/2 mi, it's still shallow in the middle...
About a mile further is circle beach, (AZ side) and watch out for BHC PD, no alcohol on the beach. (unless its in the boat
)
A few hundred yards down river, is half moon beach... last decent beach 'til the Avi.
The Avi is about ~2 miles down, NV. side
Hope this helps
Dan'l
