Disabled but needed a holiday

hi my wife was diagnosed with inoperable cancer in her back-passage about three years ago ,she underwent radical chemo and radio and is still a oncologist,her tumour had eaten through the wall of her back passage into her Vigina,it's also left her with a fistula in her back passage ,which gives her infection after infection and left her with a illiostomy bag for life ,also a very large hernia,and other issues ,my point is that after talking to her oncologist he said that she needed a good holiday ,so our whole family went to menorca for two weeks with my wife in a wheelchair,now she has had her DLA to PIP form should we say about the holiday ?her doctor has given her a letter to send to DWP stating that she is severely disabled also she gave her an emergency pack to go on holiday ,what should she do?HELP