Safe to go alone?
Yes. Be smart. Do not get falling down drunk. Do not dress like you are a millionaire. Don't call attention to yourself. Stay within the one block around HK. I've only traveled alone, over a dozen times. You'll be fine as long as you use common sense.
Parking?
I always cross as a pedestrian. But people park at HK regularly without incident. Tip the valet $1 & you'll be fine.
ATM:
For many reasons, I would not use an ATM there. Bring the cash you need. Very strong recommendation!
There is also a TON of information on the sister forum. Instead of USAsg, try InternationalSG. Highly recommend you read the info there. Very helpful.
As for HK, prepare to have your mind blown. It can be shocking your first visit. In a very good way.
[QUOTE=OcAllen;3908917]Looking to drive down one of these weekends, is it safe to go alone? I'm thinking of crossing the boarder and parking my car at hk because everyone's been raving about this place. Should I bring hard cash or use the atm there. Let me know thanks!![/QUOTE]