Hey JP,
 
 
     There is no wading at the basin.  Your actually standing on a raised wall with a metal fence around it.  
 
     As far as parking, There is limited parking right at the basin but you have to get there pretty early or late to secure a parking spot otherwise you may be driving around a while.  I would suggest either bringing a roll of quarters with you just in case you can't find a spot or better than that, take the metro in.  Its about a 3 block walk to the basin but then you dont need to deal with parking or the traffic.
 
Hope that helps and enjoy the views.  :)  
 
 
Aaron
 
 
P.S.   Just make sure if you hook a tourist, It's catch and release  ONLY!