Our only experience with our kids and Disney has been through MAW and a GAC was provided. The only accommodation we will need is an accessible entrance for the wheelchairs. Since our kids obviously are disabled should we still get the card or just get in line? I feel stupid asking but it would be one less thing for me to misplace

Karen
I dont know if you have been to WDW since they started the new maps for Guests with Disabilities.
Those list the accessible Mobility Access entrances, which are the main entrance in most cases. If that is all you need, you should be good without a GAC.
The only if is whether your childrens wheelchairs might resemble or be mistaken for strollers. If so, you should get Stroller as Wheelchair tags.
I would suggest carrying a copy of the map for Guests with Disabilities for the park you are in. If a CM questions you when you are using the listed Mobility Access, showing the special park map will usually solve the problem. If not, ask for a supervisor.
We have occassionally had a problem. Once was on Dumbo, where a CM said, I need to see your GAC, and then corrected herself right away (Oh, I didnt notice. You have a wheelchair).
Another time was at Winnie the Pooh where we were using Fastpasses and the CM at the Fastpass entrance said she could not let us in without a GAC. I said But, we have Fastpasses. Another CM overheard and corrected the first CM.
The last time was at Splash Mountain, where a CM did not want to let us thru the wheelchair gate when we got to the stairway. She did not care whether we had a GAC or wheelchair, she was just not letting us thru because That would be skipping part of the line. She even argued with her supervisor.
So, IMHO, making sure that you are at the correct entrance and making sure the CM gets corrected if they are not letting your in there are very important. It is policy that a GAC is not required to use the designated accessible entrance; if most people present a GAC to use those entrance when they dont need to, CMs expect other guests to have one too.