You should be fine with the three of you, but do a proper W & B workup before you go. Get your mates to have a weigh-in beforehand. Remind them that their lives may depend on honesty!
You will have a much more relaxing day knowing 100% that you are operating within safe limits.
I suggest you search pprune for other Le Touquet trip reports. I'm sure there are some.
Have a great day,
TG.