A couple questions, I am going to be alone with DD's (2&4). Is there A way to sit down in front of the lines and wait until it is your turn??
No. Almost none of the lines have any place where you can sit and wait. Getting fastpasses as Mort suggested, is probably your best bet. What some people do is get a folding stool cane combination to take in line with them since there is no place to sit. They are fairly small and the seat folds up into the cane when you don't need to use it. You can get those at sporting goods stores and it would not be a problem to bring one of those in line and in the ride cars (a lot of other people have done it). You could get a wheelchair, but most of the lines are Mainstream (wheelchair users wait in the same line as everyone else). Propelling a wheelchair while you sit in it would not be easy. It gets very tiring for people who are used to using a wheelchair because of the distances involved at WDW.
[/QUOTE]What about seating at the parades. Do they have any chairs you can sit in??[/QUOTE]
They don't have chairs. You might be able to find a bench, depending on where you sit, but the benches are not right up by the curb (or turned toward the WS lagoon at Epcot). One of our favorite places to sit at MK for parades is the porch in front of the building that Tony's Restaurant is in. There are rocking chairs on the porch that you can pull up to the railing. You do need to get there early (which might be a problem with kids of your girls ages). You might be able to get a Guest Assistance Card (GAC); you go to Guest Services to explain your needs to the CM and request one. It would be good at all the parks for your whole length of stay. The GAC is meant to give CMs information about needs for assistance that they can't see easily. If you got a GAC, you would probably be able to use the wheelchair entrances to rides, which would not usually shorten your wait, but would allow you to board at the exit where there is more time and space for boarding. You might need that with the cast and 2 little girls. If you have a wheelchair, you would not need a GAC, since the CMs will route you to the correct place.
You might want to think about how much assistance your 2 yr old will need and whether or not you will be able to do it by yourself (things like stepping up to the bus, getting on/off rides, bathroom). If youthink she will need more help than you can provide with your leg in a cast, some options would be to cancel, to bring someone along to help you, to mostly stay at the resort (I don't know how long your trip is), or possibly hire someone to help you (I've read where people have gotten a "Fairy Godmother" to come along some days to help). One place you might not think of spending much time is Epcot, but I know the Kidcot stations there are very popular with kids when you want to just take it easy and let the kids have kid fun.
I went to the disability site, but could not get the basic info. I feel pretty silly as there are people with some real disabilities and mine is from being clumsy.
Actually, we get a lot of people with temporary disabilities (even from being clumsy)
. If you have any specific questions though and you want to PM me, feel free to do that. Good luck on your trip.