Ok, as I mentioned in one of your other threads, we stayed in the Masters Inn which is directly opposite the Wyndham and this is what we did.
We didn't bother with the I-Trolley because it is slow, and also can be busy - they are only little things and can't hold many people. More than once did we see people waiting for the trolley only for it to whizz past and not stop because it was full. The Lynx buses atleast run to a schedule, and they are pretty good at it.
So, (from memory) we would catch the Lynx bus to Seaworld (can't think of the number right now, but I can find it if you'd like) we would be at the bus stop at 20 minutes to the hour for the bus that was due at about 15 minutes to the hour. When you get on ask for a Transfer Ticket from the driver. Instead of the fare being $1, it cost $1.10c and you need the exact money, but it means you can ride the bus to SW and then change for no extra charge to the Disney bus. Then we would ride to Seaworld, but when you go under the Freeway bridge and the bus turns RIGHT to SW you get off the stop there (it's at the start of the SW Carparks. Don't wait to get off at the main SW stop because that where EVERYONE gets on and you'll be hard pushed to get a seat on the Disney bus! You *should* get to this stop just about on the hour which means a 10 minute wait for the Disney Lynx. When we were there, the Disney bus only ran once an hour, so if you miss it, you're stuffed, but they've been adding and changing all sorts of schedules and last time I looked there was now 2 an hour. Check the Lynx website just before you leave for your trip to be sure of their latest time table. If all went to plan with us, we'd be at TTC by half past the hour, so the trip took 50 minutes in total.
As for the fireworks, well, if they are late, then no, the Lynx buses stopped running at around 10 I think. What we did then was catch a regular Disney bus to Downtown Disney and get a taxi home from there (there are always some waiting at a number of Ranks, especially at Pleasure Island) which would cost us about $20. The I-ride runs till midnight, so if you wanted to really keep costs down you could get the taxi to SW and pick the trolley up from there. Alternatively, if you knew you'd be staying for the fireworks you could arrange a Mears Transfer for that day - I think it's $12 for an adult return and something like $7 or 8 for a one way trip, so might be worth considering.
Penny