If the situation is likely to get bad then..
You can make an application to the court for appointing court commissioner (an authorised person appointed by court) in whose presence wife can enter your home and collect her stuff by informing you with an advance notice.
OR Both parties can request their respective advocates to remain present.
It is advisable to stay calm and settle the issue amicably..
prepare a list of the items she is taking.. and let the same be signed by both parties in the presence of their advocates.