We dont have rallies in the american way. I can get anywhere in the Netherlands within 3 hours and there are thousands of mopeds/riders in my town alone, so there is no need for multiple days of rallying.
We do have group rides but these are dominated by cranky old geezers on oldtimers that usually frown upon my puch maxi.
Your always welcome to come ride with me and my friends though and we already made some plans for our moped vacation next year, Hamburg is on the possibilities list.