Congrats on your purchase of an excellent honeysuckle. Your hummingbirds will be very pleased!

Native honeysuckle (lonicera sempervirens) is not a rampant vine and your trellis size will be fine. Try to place your vine in full sun with good air circulation to avoid mildew problems. On pruning, you should prune this vine sparingly - in early spring remove dead wood and take off a bit of excess growth if your vine begins to outgrow your trellis. Do not give this vine a hard pruning as this will eliminate most of the season's flowering. Keep a close eye open for aphids on this vine as they can hinder new growth. Enjoy!