Cameras & Motorbikes

Hey guys, just discovered this news group! So I hope you don't mind if
I jump in with a question and I hope it is the right place to ask.

Can any of you offer suggestions as to how to carry a SLR camera and
all the accessories on a motorbike securely, dryly and with easy
access?

I currently have my equipment in a Tamrac shoulder bag which I place
inside my magnetic tank bag. However it is quite awkard to get camera
out in a reasonable time.

I thought about converting the tank bag to a camera bag with
foam insterts/padding.

Any comments/solutions that others have come up with?

TIA

I'd like to carry most of the stuff listed below. 

I have a:
  Nikon D80 
   http://tinyurl.com/5sojum

With the following lenses:
   Nikkor AF-S DX VR 18-200mm f/3.5-5.6G IF-ED
     http://tinyurl.com/6apkt6
   NIkkor AF 50mm f/1.8D  
     http://tinyurl.com/69pw9f
   Nikkor AF-S 18-55mm f/3.5-5.6G EDII
      http://tinyurl.com/3qk7lj
      [For Sale! $75 o.n.o. -  contact me: znarkk at google mail]

Tripods: (looking for a better tripod & head atm)
   Gorillapod SLR-Zoom 
      http://tinyurl.com/27mxw7
   Slik Mirage Tripod
      http://tinyurl.com/4vy2xq

And acessories:
   Nikon Speedlight SB-800
      http://tinyurl.com/3ppsvg

+ spare batteries for flash & camera, various filters, 
   memory cards, brush/blower, cable relase.
-- 
znark 
2005 Honda VTR1000F5 Firestorm Matte Black
http://znark.blogspot.com
http://znark.smugmug.com