Step 5: Their Medtronic pump (from home) and Bayer meter will be uploaded. Two Enlite sensor will be used during the inpatient study. Only one Enlite sensor will be used during the camp phase of the study. All sensors will be inserted before 3pm and subjects will be given a study pump, and all their pump settings will be transferred to the study Revel 2.0 Medtronic Insulin Pump. They will receive training on the study pump and Enlite sensors. The CGM training will be done as a group session and will consist of the standard teaching which we developed for the JDRF (Juvenile Diabetes Research Foundation) randomized clinical trial. Insulin doses are only given by camp medical staff (including all correction doses), we will not use predictive alarms. Alarm thresholds will be set for 70 and 250 mg/dl during the day and on control nights. When the CLP is active at night, the local alarms on the Revel 2.0 pump will be turned off. There will be no rate of change alarms. There active insulin time will be set to 6 hours. This will probably be different from their usual setting, and this will be explained to that this setting is for safety purposes during this study. The bolus wizard feature of the pump will be turned on and used for all insulin doses. They may use the type of meal boluses they would routinely use for meals at home (standard and/or dual wave or square wave boluses).