My wife and I are thinking that in a few years after retirement, we might try to buy a used class B RV, with a Diesel engine. She was initially thinking of a VW Westie, but decided that was too small. Uhh, no kidding!
For the first few years after retirement, we're going to try to get in a few international trips. After that, we'll be playing gypsies traveling by RV around North America. At least that's the plan.