I have to suggest strapping everything to your bike instead of strapping everything to your back. If that is possible with the type of trip you are planning.
I'm selling a bundle of my bike touring and camping gear on eBay right now. In case you are interested. You would need a 26" wheeled bike to make it work.
http://cgi.ebay.com/ws/eBayISAPI.dll...7605&rd=1&rd=1
I wouldn't want to walk around carrying my bike + my gear. To me, that would not be a vacation.
Best of luck in your decision.