Any drastic pruning is best carried out in the spring, immediately after flowering. Plants are very tolerant of even the most drastic pruning and will re-grow even if cut right back to the base.
Pruning the vine down to a desirable length should not be a problem!
Wisteria can be a climbing plant, twining in an anti-clockwise direction, around the stems of other plants. This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby.
Wisteria trees prefer a good loamy soil in a sunny south or southwest facing position, sheltered from cold winds and from early morning sun on frosty mornings. Plants can become chlorotic on alkaline soils. A soil that is too rich results in excessive foliage at the expense of flowering. Plants can take a few years to settle down after planting out. Too much shade or too rich a soil are normally the culprits, and some form of root restriction can be beneficial.