We do have experience, but you know yourself and your preferences. You should bring what you feel you can't live without. For safety reasons, do not pack aerosol cans, lighter fluid, or any other highly flammable substance. An option you might consider is mailing items to yourself. Some Volunteers have used surface mail to send inexpensive items that they did not want to pack in their bags.
Surface mail is a fairly inexpensive way to get stuff to Ghana.
Do not send boxes via airline cargo because duty is charged in Ghana. Sending anything by surface mail is at your own cost and risk. Your luggage will get tossed around unmercifully so pick out sturdy bags - tough canvas or nylon. All bags should lock securely to be sure your things get safely to and through the Accra airport. Suitcases are hard to travel with.