I use Danstar / Lallemand Belle Saison yeast for my saisons, and often ferment them at ambient temps with no attempt at temp control. I want the funky yeasty estery fruity character that a Saison yeast produces. At low temps it's very subdued... I've used it at low temps for Belgian Wit beers, at higher temps it's very "in your face" Belgian, but without the clove flavors some Belgian yeasts throw. Of the yeasts I use, this is one of my favorites. My inclination is to "turn it loose" to do what it will at whatever temps it sees. With some yeasts temp creates "off flavors"............ With Belle Saison, they aren't "off flavors" but Saison flavors......... I don't stress about temps........ I know what I'm going to get, and I'm cool with it. I've fermented from the 50's to the 90's ........ and I prefer the higher temps.
H.W.