You might find this buyers checklist of use. Fiberglass RV - Document Center - Buyers Check List
TWO Berner Sunnenhund is a LOT of floor space :-) In a 13 ft. you might have to consider you take the bunks and give them the bed!
Here is a link to the Fiberglass RV rally
map, you might want to consider hitting one of these. Open house time is common at a rally
and most participants would be happy to show you their rigs. Good way to see lots of brands and models to get a clear idea of what will work for you. http://www.fiberglassrv.com/forums/f...aps-67269.html
I do see a May rally
over in Indiana.
The bunk model of 13 ft. the bunk is convertible between a couch or bunk bed. If you dogs will both sleep or lie down on the 6 foot of couch with the top bunk up (makes a cave sort of) then you can use the top bunk as a shelf for gear while the dogs take the bottom bunk. Floor wise 13 ft. only has about 5 ft. of floor. A 40 lb. Standard Schnauzer takes about 1/2 of it. Or stretches out until she does. My Floor!
Also need to consider what the tow vehicle can handle in terms of rated towing weight
in picking a camper. This list of trailer weights collected at rallies may prove useful. http://www.fiberglassrv.com/forums/f...rld-43010.html
Some weather can make AC pretty much required for the dogs comfort. AC adds weight
and sometimes takes up storage space (Some Scamps have them in closet/cupboard) Or on roof make the camper taller which may not fit in garage or carport. Bathroom will be a lot of floor space to give up when the 4 of you are in there so that might impact the size camper that will work well for you.
I'm sure some big dog owners will weigh in soon, we have a lot of dog owning members that camp or travel with their dog, couple of cat owners too now that I think about it.
Good luck in your search and welcome!