Honestly that time of the year, there are no snow climbs that do not involve glaciers that will be Wide open without snow bridges. Glacier ice climbing in fall is great though with a partner and ice screws etc.
Likewise your volcano climbs(middle sister) will be retched experiences as you will be toiling through, pardon the pun, mountains of VERY LOOSE pumice = Pain In The ASS(PITA). Volcanoes are best climbed in early summer when all the hordes of pumice is buried under snow.
Hyas Creek Glacier isn't a glacier, but has beautiful fall colors in that region going up to Mt. Daniel. "trail" boot path to the top.
Colchuck isn't a glacier either, but there is no destination for climbing Colchuck glacier. All the peaks require rope and a partner unless you free solo 5.6 and above.
Sorry, not exactly helping you here. Fly to New Zealand? =)