As I have a caravan near the coast, it is a weekend trip for me. If a look 5 years back, I barely missed a weekend during 4-5 months of kite season.
1. 4 Hours driving one way (350km)
2. Depends on conditions, but on average 2 to 5 hours per day.
3. Nice evenings with a sip of rum near the campfire with 0 energy left