If you are there at the right times, you can watch the bridge go up to let the boat traffic through, especially on weekends. There used to be a small boat ramp on the other side of the bridge, but because of the congestion and lack of parking, the County recently closed it and put grass there.
The boats and bridge will provide some distraction but since there may be "Fisher-muggles" in the area, you may have to use extreme mis-direction and stealth.
It is not ON the Walkway so please don't block the traffic.
And please be aware of passers-by whilst retrieving and replacing the cache so as not to attract too much attention.
Please make sure it remains as securely hidden for the next finder. 
Oh BTW, it contains only a Log so BYOP, thanks!
Hope you enjoy it !!
P.S: We couldn't have done this without George de Mestral*.
(*Look up his name)