So you think ill be ok just make sure I dont book with Dollar or Thrifty then ??
Hertz uses its own PlatePass (vehicle registration plate recognition). The charge is $2.95 per day, up to a maximum of $14.95 a month. So:
1 day rental is $2.95 plus tolls
2 day rental is $5.90 plus tolls
3 day rental is $8.85 plus tolls
4 day rental is $11.80 plus tolls
5-30 day rental is $14.75 plus tolls
An average Brit holidaying in Florida, then, will pay $14.95 plus tolls.
Avis and Budget are virtually identical - $2.95 per day, maximum $14.75 per month.
National and Alamo offer the best deal - $2 per day
that you actually use the toll lanes to a maximum of $6 per rental period. So if you use the toll lanes for a day of your holiday, you'll pay $2 plus tolls, 2 days $4, 3 days + $6.
There are other rental companies, but none that are likely to be used by UK renters.
Do i need to tell the rental company before i book with them or not ?
Dollar/Thrifty:
You must either opt-in or decline at time of reservation or at the rental counter. All daily charges will be included on your receipt when you return the car. No billing is done after the fact unless you fail to select the tolling option and still use the toll lanes. If you fail to enrol at time of reservation or at the rental counter, and incur toll charges by using a dedicated or express lane, a $25.00 administrative fee + toll will be charged for each infraction. These fees and tolls are charged separately after the completion of the rental.
Hertz, National, Alamo:
No need to declare anything at time of reservation or rental. Opt-in decision is made if you elect to use a toll lane.
Avis, Budget:
You'll be automatically opted in.
Ill have a look on maps later at your routes.. How long drive about 3 1/2 hours?
Yes, I'd say so. We've done it 3 times now. Last March, from leaving the Car Rental Center to pulling up on our friends' drive in Orlando, it took us 3 hours 20 minutes, but we were disembarking a cruise early on a Saturday morning and, thus, the traffic was light. Getting out of Miami is the most trying part of the journey and during rush-hour you might get held up. Even so, as long as the traffic doesn't grind to a complete halt, you should do it in 3.5 - 4 hours.
ETA: I'm not sure I'd bother for a saving of £200 on flights, particularly when that's probably going to be reduced to around £150 once you've factored in fuel and toll charges. You say that it won't be so bad on the way back, but the drive from the Tampa/Clearwater/St Pete's area is actually longer than the one between Miami and Orlando and almost 200 miles further than driving back to Orlando at the end of your trip. You'd be looking at adding 400 miles to your driving tally by flying in and out of Miami. It's a long drive after a day of transatlantic travel and all that entails, and at the end of your holiday you have to devote your entire last day to travelling.