Hydration yes. If I'm doing more than 25 will do two bottles water an hour before start. I carry two bottles but always stop at an ice house to refill if one is empty. Doom on me if I'm short on water because I didn't stop for a refill. Also will do 1 or 2 GU PACKS for a 40. That's about it. The rest is all about pace that's your call. Easier riding with a group but if their pace is too fast you may be spent befor you finish. Hope you have a good ride.