Hello Richard,
Quite the opportunity to do something spectacular here, while still enjoying the challenge and experience. Congratulations! I am jealous. Also, my Scouting days are long-passed and I didn't make it to Eagle Scout :-)
Think about THIS approach: You would, of course, need at least two cameras, and everybody on the same page with the notes...
There are four of you. You have 10 days. You have 10 tasks to complete - presumably one each day of the 10 days? You will start "somewhere" in France, and wind up "somewhere" in Spain - we all hope. You've been told you WILL have a video presentation.
OK, assuming you have access to cameras and editing of your footage for the final production...
One person is assigned with individual documentary interviews (switched, of course, when that person's time comes to be in front of the camera).
One person is assigned with principal photography (videography) "documenting" the documentary efforts above. That person, while having the "principal" responsibilities, will also trade off so as to be both in front of and behind, at some point, both cameras.
This unique perspective, while putting the PRIMARY responsibility of the two approaches on the shoulders of two individuals for a solid consistent development and shooting style, will offer some change-up from time-to-time as the others put their unique twist, thoughts, approach or concept to use in these "guest" roles of responsibility. Also, everybody gets a shot at shooting, directing and producing content.
BEGIN WITH...
Each of you taking a turn to to a VERY BRIEF overview of the adventure, the challenges, expectations and how you hope or plan to get from F to S if it were left entirely up to you.
While this is happening, alternate shooters shoot the process of this being done.
This could be done while you all are en route to your starting destination - I presume you will be flying?
From there, the broad picture documentarian will capture arrival and departure elements of the journey to your starting point in France. That person will record the planning session for the first day's project and for the first day's path toward Spain.
At the end of the first day, before sacking out for the night, brief individual comments are videotaped for each of you, and also recorded by the "outside" documentary camera person. Again, rotation of camera duties to give each a shot of both sides of the lens.
DAY TWO: planning session, exchange cameras with each other during the day's progression, end with the recaps.
DAY THREE: repeat...
...and so forth.
Elements of this planned approach will begin to take lives of their own, and as each of you have a shot at interviews, comments and documenting from the outside perspective the events and experiences of the day, including the DAILY? task, how it was set up, planned and the approach and/or level of success regarding the accomplishment of that "task". Be sure to get each member's opinion regarding the outcome as well.
Try to build up some suspense by expressing on-camera, the possibilities and challenges of each day, asking with a serious demeanor "can we do it?" "will we succeed?" "what are the chances of dismal failure or overwhelming success?" In other words, some teasers like "stay tuned and find out" making your viewera wait until the end of daily production segments, to find out what the set up, conflict and resolution finally was both on a daily basis, and over the entire 10 days.
By using a consistent style of opening, experiencing and recapping each day, then a final review of the whole experience, you should have an awesome, consistent and organized collection of material for something that will be anything BUT boring, even it it hangs closer to 20 minutes or GASP a half-hour.
Perhaps three: a full documentary of 30- to 45-minutes or one hour; a tightly-edited and condensed 15-minute special edition full of mystery and intensity, reflecting the final results; and a movie-trailer teaser style production with all the visual and auditory HOT BUTTONS that will make the intended audience ABSOLUTELY HAVE to see the other two.
Let me know if this is of any help, please.
Also, you WILL post a video so we here at Videomaker Forums get a chance to see and enjoy your experience. :-)
Go for it Richard, and gang!
Earl