If GCNP isn't open later this month, we might try to visit Marble Canyon. We would need to do this either on the way from Sedona to Page or as a day trip from Page where we will be staying for two nights.
With 89 closed south of Page, it looks like it will be quite a detour to get to Marble Canyon, no matter where we start out. If we leave from Page (we'll actually be staying in Big Water, UT), we could spend some time in Kanab before heading on to MC on 89A. We'd have to travel through Vermilion Cliffs Nat'l Monument with this option.
Is that part of 89A even open? Is MC worth the effort?