In mid-August I'll arrive in Paris and have about 25 days to fill with adventure. Unfortunately my wife had to bail, so instead of trekking I'm planning to do a solo cycle tour, either on my road or mountain bike. I would plan to have no more than about 5 kg/11 lbs of gear so I won't be weighed down while riding. Given the ultralight goal I'll need to select a route with reasonable accommodation and food options along the way. There is absolutely zero chance of me doing an organized tour as I value improvisation when traveling. I'm 32 and budget is totally open for travel between regions and basic accommodation - I want to have a lifetime experience yet be frugal where possible.
MOUNTAIN BIKING
My heart wants to do a mountain biking tour and spend as much time in the backcountry away from traffic and congestion as possible, but still in a position to meet a bunch of people. Are there any good resources out there for mountain bike cycle tour routes? Camino Santiago trail may be fun, but are there other recommended long distance routes? Is the Camino trail going to be undesirable from mid-August through early September due to heat and overcrowding? Would it make more sense for me to break this into a few week-long mountain bike tours in different regions? If so, what are some recommendations for an experienced solo cycle tourist with no camping or cooking gear?
ROAD BIKING
By searching this forum I found pretty good route options for road biking on the EuroVelo website. If I were to pick one of those routes it would be the Eastern European route starting in Helsinki heading as far south as I could make it.
http://www.eurovelo.com/en/eurovelos/eurovelo-11
I do a lot of big distance road rides in the California mountains and have done some cycle-touring in the US with daily distances ranging from 80-200+ miles and 15k+ feet climbing, so challenging terrain is invited but not required. Temps exceeding 80 F, 27 C will likely happen no matter what, but I'd like excess temperature to be limited.
Any advice/recommendations?

