Where to go?
When traveling by car usually starts from the big cities, and when planning a tour by caravan, I would recommend not to focus only on them, but rather to consider other places.
In Europe, it can be any road of the castles, the wine routes or the dusty roads of Tuscany. In the vast expanses of the United States, Australia, New Zealand and Canada, caravan magnets are all kinds of national parks, natural areas or abandoned cities of gold miners. Well, just drive through the country as it is, bypassing the highways, it is quite interesting.
For sure there are places where you want (or even dream) to call necessarily, estimate the main big points on which the route will run. And the next step can be going on local forums places caravans, yes and simply tourists. People are happy to share tips on where to go between points A and B, what to devote more time, and what will be enough and one look. Gradually, the map will be filled with stars along the route, and you will understand approximately where and how many days you want to spend.
When to go?
Here, as with any trip, the low season can be very attractive. This is especially true in Europe. In March, for example, in the cities it is already warm, and in the mountains it is still snow, there are few tourists, campsites are almost empty, so you can just come to any city in the evening, without booking anything, and prices are lower than in summer.
As for the United States and Canada, you should be careful if you definitely plan to visit national parks. Quite out of season, many roads may still be closed, so it is better to plan a trip at least at the beginning of the season, so as not to stumble on closed barriers and non-working campsites.
In principle, in ten days you can drive 5,500 kilometers and have fun. But in this case, some days you will need to go 700-900 kilometers to other days more time to stay in one place.
The easiest way to go 200-400 kilometers a day, stopping here and there in all sorts of interesting places. Although in this case, the coverage of the territories will be less.
When traveling in the United States or, say, Australia, there is almost no way to avoid long days on the road, when there is only desert, sky and asphalt. In fact, there is nothing wrong with that. In a caravan, the road is generally carried much more comfortably than in a conventional car, and drivers can change from time to time.
In order not to burn out emotionally in the road days, you can distribute them evenly; determine their place not at the very beginning and not at the very end of the route. And after a long day, if possible, do a few short ones or even stay longer in one place.
In General, all these tips on distances are quite relative, because caravanning is so good that you can choose a comfortable pace and number of kilometers for you personally.