What you need is a super compact digital zoom camera.
Half of my pics posted were taken with one...Sony DSCH-7
There are about 4-5 to choose from 7-10 megapixels and a good clear zoom of 15x or better with a FAST lens and some good modes including continuous shooting modes with image stabilization and good manual setting capablities like saturation, contrast, sharpness and a super high ISO over 1600
I used a Sony DSC H-7 just recently and you could make it sing and dance with the DSLRs with the kit lens.
Other models to mention:
Nikon Coolpix P80
These are going to cost you $350-$50 US
Some how Canon does not want to make a high zoom and for their prices you can get something better..The world has caught up to Canon and has passed it on quality and price
Any of these models you should be able to dial in several custom modes for outdoor waterfowl shooting to your advantage.
Just try to remember to forget about the point and shoot Auto E moade as you will have to go to the software to massage the pic and not be happy because all makers make tha mode in a color lacking soft pics which are not tack sharp
Forget about the DSLR as you may not have the time to learn and setup and switch lens when the action starts as these may weigh as much as your gun