My wife and I purchased our first popup in 2012. It was a Flagstaff 176ltd. It has an 8' box and fit nicely in our garage. However, as you can imagine, the 8ft box is small. It was okay for my wife, me and 5 year old.. but the lack of space was always the elephant in the room. LOL..
We recently purchased a '14 Rockwood 2318g. The slide-out was a MAJOR purchasing factor along with the 12' box. In total, it's about 17.3' long, closed. My garage is 19' deep so it just fits!
The slide really opens up the floor plan. I won't be able to purchase a slideless popup again.. lol
2011 Toyota Tundra Crewmax
2014 Rockwood Freedom 2318g
Proud Father, Eagle Scout, EMT and Combat Veteran