I just returned from AC, where I was married. We stayed up on the North End about 3 miles from town at Captain Morgan's Resort. It was everything we wanted. Quite, secluded, nice setting, thatched cabana. We enjoyed the fact we were away from town and did not find it cumbersome to take the water taxi into town. You are more than welcome to check out some of our pictures. go to www.kyautosales.com/belize.htm
if this link doesn't work by clicking on it copy it into your web browser. The pictures of our wedding are far away because some people we met from the resort were actually taking them and they didn't want to interfere w/our photographer. If you haven't already contact Kay Scott, she is the island photographer and did a wonderful job.
If you continue to search this board you will notice that a lot of people like Victoria House especially for the wedding setting. You may want to contact them. I only saw the ouside of this resort and the beach and it does look beautiful. Stay in contact with this board and you will get lots of useful information.
As for your dad I would recommend a golf cart and he'll be fine. The streets in San Pedro are not long and there's only three of them.
Congratulations to you and good luck. Do relax, everything will work out.