Roundup was a week-long encampment of senior scouts. Each council sent 8 girls. In the end there were almost 10,000 of us. Dress codes applied, so it was a sea of green. ;-) The train stopped at Yellowstone, and we clogged the park road with a few miles of yellow buses. We were an official military training exercise, so we got a look at field conditions: cold showers with no roof (we had to watch out for helicopters!), military escorts if we left the tent at night. I can't remember the toilets, but this was before portapotties, so probably they were pit toilets. There was a MASH unit, complete with OR. Remember, this was 1965. Their next stop was Vietnam. We made chotskis to trade, and decorated the bright yellow plastic cowboy hats we were issued with them. Every group put together a demonstration about their home, and visiting was a big part of it. There were ceremonies, of course, but I really can't remember those. I do remember the "little dustdevil" that whipped a couple tents 40 feet in the air (it didn't impress the Oklahoma girls at all). The last day was cut short by an awesome thunderstorm. In New England you can't see lightning setting fires 20 miles away an hour before the rain starts. And we sang. Trading songs and sharing the official Girl Scout songs was part of it, too.