I assume you mean the first time you took a bike tour that was more than one day.

Mine was Seattle, WA to Bar Harbor, ME to Philadelphia, PA to Ocean City, NJ

The week before I caught a train to Seattle I took a 62 mile day ride to familiarize myself with riding a loaded bike. During the ride, some kid went into the grass, lost control of his car, hit a telephone pole and flipped about 50' behind me. Had I been a little slower, that might have been the end of me.

The night after the first day of riding was the first time I ever slept in a tent. I was with a group of 13 people. I learned quickly that a tent provides no protection from loud snorers. When nature called in the middle of the night I also learned that raccoons can be real pests.