Peace On Earth International assemblies, I think. I was in Chicago (might have helped cook some of that hot food served under the tents.) We stayed in someones home, too, probably the dirtiest place I ever slept. I locked myself in the bathroom after asking for a wash cloth, found scouring powder under the sink, and scrubbed down the whole room. When we got home one night there was someone sleeping in our bed! But I loved the 8-day assemblies. I was 20, pioneering, and without a lot of other responsibilities at the time.
I was also at Wembley as my pio partner and I scrimped and saved to attend the European conventions. We traveled Europe for a month and though we didn't get along, being in Europe was wonderful!
The long conventions must have been a nightmare for families. My mom took my baby sister to Yankee Stadium in 58 or so and washed diapers in the bath tub. The apartment was roach filled; once they were at a restaurant and a big roach crawled out of her purse! I don't think she ever missed an assembly.