I'm on a medtonic pump with Novalog. My normal pattern with a long ride is to bolus covering my meal, then after an hour of riding, turn the pump off. I do not use a CGM because of constant false readings when riding. CGMs don't work well with exercise -- interstitial levels don't match well with blood glucose when levels are changing rapidly. I have learned to check manually frequently and I have pretty good awareness. I know this is important and dangerous so I pay attention.
On the Medtronic MiniMed 530G myself. Using the built in CGMS with it. Can't speak to the not working with exercise comment. But during exercise is not really when its important to have CGMS. When riding I am very alert and aware of everything. So know when the glucose is low. Usually not a concern when riding. It can be but not usually. Its at night and when not riding that is the problem. Exercise can and does have the effect of reducing glucose levels long after the exercise has stopped. Particularly during the night after exercise. That is when the CGMS would be very helpful.
With just the 2 week unsupported section in the middle you should not have too many troubles with supplies.