I'm planning on using walk-in campsites at the Portal 4 weeks from now. We are doing a dayhike up the MR and my intent is to drive home that night. Some in my group (retired) want to camp at the portal a 2nd night and then head over to Tuolumne Meadows and possibly hike up to Clouds Rest. Is that allowed? Can they leave their tents set up or do we have pack up in the morning and then pay again for a 2nd night later that day and then pitch the tents a second time?