Why not get both?
I have the Clam Voyager, and I have a couple of different heaters.
I have a sport cat for the really nice days, I use it just to dry my hands.
Most of the time, I use my Buddy Heater, and it works great.
I do have the Big Buddy Heater, which is usually kept in the truck. It is only used if it is really cold out.
I have my stuff very well organized in my shack, but I do have a few items that are in the truck "just in case".
I can make the change when I get to the lake if the conditions are not what I expected them to be. (Darn weatherman)
If you decide to go with the #20 and hose, get the more expensive Green hose. It lasts longer, and doesn't need the filter like the regular hose.
I follow the old Ranger motto : Better to have and not need, then to need and not have.
Hope this helps,
Wiener