Argos are ok, not in fast water. Air boats are ok, just have to keep a eye out for snags. They also have issues on shoals and in some Swiftwater.
I have looked at "ducks" and similar. Expensive.

 

How about a hovercraft?

http://www.hovercraft.com/content/

 

That's a good idea. I'll go to the hovercraft rental place when SHTF
. Its only $79

 

Any commercial amphibian is going to be either tiny (Argo) or expensive (DUKW).

I plan to build my own amphibious capability. A fairly simple folding barge trailer. Using this concept: http://www.yacht-sale.com/myark barges.htm

I would make it double ended, with a tow bar and running lights at each end. And, besides the folding panels, I would add folding or removable ramps at each end. That way it could be set from one side of a stream and recovered from the other when using as a low water bridge. Would only need a pair of outboards on one end, since if you are on open water, the barge can travel any direction.

Just my opinion.

 

Those are very cool. How much are those things going for Jerry?

 

just put small pontoons on a decent trailer.

or get a canoe or 8-10ft jon boat and mount it on the roof of your vehicle.

 

Dobbertin Surface Orbiter??

 

Schwimmwagen?

 

Water Car Panther ("Jeep")--only $155,000!

 

whatever you decide, don't get an army surplus Gamma Goat. saw one on ebay for sale. they don't swim well at all. lost a couple in Panama with waves less than a foot high. not nearly enough freeboard for their weight.

 

If style is important, there is the Lotus Esprit option ...

 

As a kid I got to sit in the Half-Safe a WWII vintage modified amphibious Jeep that went around the world. A friend of my Dad's was storing for the owner after the trip and we were invited to see it and view a documentary movie about it. The Half-Safe is now on display in Perth, Australia.

 

As someone that lives in an area that gets floods every few years I can say this would be a far better option than trying to drive thru flood water. On the plus side you also got a boat for when its not need as a BOV, you might even be able to avoid boat ramp fees:thumb:

 

None of the vehicles the OP mentions are much good for bugging out beyond a SHORT distance. Plus as far as I know (could be wrong) they have very little in the way of load capacity.

Now if the need is to simply move around his flooded town then they could work BUT a small boat would be MUCH more cost effective.