for mid october the places which the article picks out for being the best for park are, in no particular order
Tignes- glacier park, not top choice but park set up improving (not sure how it is, had mixed reviews from friends last season.)
Deux Alps- glacier, Awesome park set up with a solid rail set up, jump lines and pipe (says it re-opened on the 22nd and then they swapped to the winter park start of nov, couldnt find a date for glacier park closing on their site)
Hintertux- probably the favourite of the glacier parks with pipe, "three kicker pro line" (probably a bunch of other stuff) opens at the end of sept
Kauntertal- opens mid october (so possibly hit or miss depending on weather) decent park set up but finding accomodation is supposedly hard.
Les Diablerets- Good balanced park for all/most levels but doesnt open til the 9th of Nov.
Zermatt-Carvinia-n Glacier park, largest skiable area, pipe and rails being best features, most likely re-opening late october depending on conditions.
Val Senales- 120,000 sqaure metre park, small general ski area open, all levels well catered for in set up, opens around 10th Oct.
Dachstein- Small glacier are but almost completely park , some of the best shaped features around, amazing backdrop for getting shots, opening mid to end of october (look on their website really)
thats a paraphrasing of the article it has a little accomodation advice which i dint completely include but if any took a serious fancy i can do a word for word of the piece on the resort.