Travelling and benefits

Hey people, My girlfriend has aspergers, apart from leaving the home with support twice a week she stays in. It has been her dream to travel to Japan and i want to make that happen. I'm wondering if anyone knows of any problems that it may cause to her benefits and diability allowance etc to be away for about 10 days or would there be any actual need to inform anybody of what she spends her money on or that she has gone on holiday at all, It just seemed ridiculous that someone that can't leave home without support be restricted from being helped experience the world