It is good to get into the habit of making a log entry for every paddle you go on. Your log book should be divided so that each trip has it's own entry, that is dated and as a minimum contains:
Summaries such as "5 paddles during December, various locations" are considered unverifiable and inadmissible in courts as evidence of currency and therefore are unacceptable when re-registering your award.
DO NOT SEND US YOUR ORIGINAL LOGBOOK