Paul
They are guests in your house and have no right to look anywhere other than where you allow, in most cases it is unlikely that they will ask, but if they do, then it may be to your advantage to allow them if you have said that you are dependant on aids and appliances to help you with your daily activities, as they may want to confirm what you have said.
If you can, have someone with you at the assessment then they can take them around the house as necessary.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems