you'll be fine no worries. There is always usual a couple different groups that ride different paces and different routes so you'll find a group to fit in with your comfort level fine. As an example, our group normally meets at the gas station at 8am to fuel up and be on our way usually no later than 8:30. Ride all morning, find a place for lunch, ride all afternoon, eat dinner, have a beer or two and hang out then go to bed and do it all over the next day. I only party hard the night before we leave because I can be hungover in the truck and not give a shit