Did you intend to post this in the Gulf Coast forum?
We've made this trip every year for quite a while. Assuming you'd be trailering from LA-
Take I-75 down the West Coast, it turns East, becomes I-595, and will take you right to Dania. The traffic's better than I-95, and it's simpler & cheaper than the Turnpike. We've started fueling the boat before we cross from the West Coast to avoid having to find gas in the downtown Dania area.
Unless the guys you're going with have plans already set up, plan to leave from Harbourtowne Marina ( http://www.harbourtownemarina.net
) in Dania. They have around the clock security, so you can leave your rig there without worry. Be aware of the tide, when it's too low you may have trouble launching or retrieving.
The Gulf Stream is going North @ ~5 knots, just something to be aware of if you break down.
Plan to leave as early in the day as possible, both coming and going. The water's calmer, fewer thunderstorms, and you may avoid the longer lines at Immigration & Customs.
We usually stay at the Seacrest Hotel ( http://www.seacrestbimini.com
) in Bimini. They don't have a restaurant, and that part of Bimini may be short of places to eat now that the Big Game Club has shut down. Immigration & Customs are both very short walks from there, it's right next to the Customs dock.
I'm not aware of anyone in Bimini who does outboard repairs, there's a hardware store that has some stuff. Make sure your boat and engine(s) are in top shape, take spares for whatever you think might be needed that you could repair yourself, and join SeaTow if you aren't already a member.
Did I say you need to have a current SeaTow membership? In one trip a few years back I spent enough in towing fees to pay for a lifetime of memberships.
Before crossing do a radio check with all those traveling with you, and stay in contact.
The seas can get really big, but that doesn't necessarily mean bad. When we made our first crossing there were big, slow, rollers in the Gulf Stream. Each time we would disappear from sight the kids on the buddy boat thought we were sinking, but not too uncomfortable.
Do some searches on THT in the Florida & Georgia Forum, and on the Florida Sportsman forums. Lot's of information there.
We go over to dive, most people going to Bimini go to fish. We're thinking of going to Grand Bahama this year to have some activities available for those who don't fish or dive.
If you've got specific questions fire away, I'll try to answer or refer you to someplace where you can get the answers.