Busting, it does sound like you should try to step back and let the positive experience sink in and not try to push too much just yet.
I think Kate and Heather's suggestions were really good about how to handle things with the kids. You have to be willing to step up and take chances, but do it knowing full well your H might flake out or make a decision you won't like... so be sure you are prepared for that before you put yourself in these situations. Either have no expectations (tough I know), or at the very least have your script ready to explain the let down to the kids in a way that doesn't feed their disappointment... let them hold on to the idea that Dad is busy and WOULD be there if he was able to properly choose.
me-35 WAS-37 T-16 1/2 Son-14 (HF Aspergers) BD,ILYBINILWY,"I met my soulmate": Oct5,2013 "Letting go because I love him, holding on because I love him."