So, I have a 21' Daycruiser with a sail, err bimini top, and have never had a problem with the current or the wind. I (actually the wife) puts the trailer in a bit shallow and I 'beach' the boat on the trailer, hop out and grab the boat while she backs in another few feet, and crank it up,...Easy Peasy
The Riverside is usually a bunch of rookie pwc's, And at Davis camp 'best jets' has the right of way, SERIOUSLY, there's signs (PWC rental) Yeah, Right. I paid, I'm next in line...

All the other rental co's use BHC Community park. And take their time, and mine, and use the dock as their own (beach?)...for hours
Lazy Harry's can be kinda skinny @ the entrance to the river, I've walked it over the rock bar a few times, and had to rescue a Merc once, yeah, don't follow me, you won't make it...
Jack smith you need reverse to launch, (yeah, don't ask me how I know) But Needles marina you don't...and they have gas.
Thats all I got
Dan'l