For anybody who speaks Spanish, we have a member with an unanswered question about mont-St-Michel in our Spanish-language forum:
If you have any advice to offer, could you please post your reply, in Spanish, in that forum topic?
P.S. You may be prompted to sign in when clicking that link. You do not need to create a new account -- just sign in with the same email and password you use for your current TripAdvisor account.