Namaste Shanti!
Agreed. Raja Yoga Dhyana, or any other meditation practice, Mantra Japa, and Hatha Yoga Asanas or Pranayama are best practiced without any incense burning.
The scent of even high quality incense can be a definite olfactory distraction during a meditation or mantra japa session, and poor quality incense can be overwhelmingly so. This is why I suggested only the lighting of candles for meditation or mantra japa, as a symbolic representation of the Divine Light of Jivatman embraced in the Elevated States of Consciousness experienced in deep meditation.
Hatha Asanas and Pranayama are best practiced in a well ventilated space if indoors, and weather permitting, are even better when practiced outdoors, IMO, where there is ample fresh air that is more fully laden with oxygen and electro-magnetic energy to maximize the benefits of the breath exercises and energy work.
Your custom of lighting an incense stick or burning some camphor after completing a meditation or hatha session is a good practice. The scent of the incense can then provide a lingering reminder of the Sweet Ecstacy experienced during Deep Meditation or Contemplative Prayer. The aroma will permeate the space and mingle with the vibrations of the mantram or prayers which are performed there. This is especially so when the incense is dedicated with them when lit. The incense will thereby continue to lift these vibrations upwards to God with its rising smoke as a sweet smelling devotional offering for as long as the incense burns.
And of course, it is always appropriate to offer lit incense of the highest quality available when performing an Aarti or any other personal, ceremonial ritual before the home meditation or prayer shrine.
Most people find that the lighting of candles, the ringing of ritual hand bells or gongs, the use of drone instruments, ritual drumming, chanting, sacred music, and so forth, are excellent aids in creating an atmosphere of Divine Presence which arouses an Elevated State of Consciousness during such practices. And the best part of performing such practices at the home shrine is that they can be customized according to whatever is personally most inspirational and meaningful to you.
The most important aspect of performing ritual or ceremonial devotional practices, IMO, is the inner conscious acknowledgement of God's Presence and Power in this life, combined with the deliberate outer effort made in such devotions to identify with and unite with the Divine Source of All That Is!
Here are a few examples of home meditation/prayer shrines:
http://www.paleaku.com/images/alter.jpghttp://www.windhorse.co.uk/shrine1.jpghttp://www.ixeh.net/travel/ddm/Images/pics/02-homes/02041_11.jpghttp://www.harekrsna.com/practice/sadhana/prabhupada/altar.gifHari OM!
Doc