Here we go again, the golden uterus no matter how abusive is the second coming of Christ and stepmoms are evil the second that S_T_E_P is put in front of the word MOM. I raised my bonuskids for over 14yrs, we where custodial and took vacations mainly with them, if on the very rare occassion their female parent took them for summer, which I think was twice the whole 14 years and counting. We would not stop living because the almighty bonuschildren where gone...do any of you even think of how the other child(ren) feels being told they aren't allowed to do anything as a family because the other children are not there? Oh that is right, they do not matter, only the father's children matter because ALL stepmoms are EVIL. We went on trips to the shore and to amusement parks (not disney, like Carowinds and such). Just like when my son from a prior marriage went to be with his Dad in Cali, we still did trips and did not stop living because he was gone. We went with the bonuskids to the shore, amusement parks, etc. Does anyone tell the "other" parent they are not allowed to go on any trips or anything when they do not have their children?
OP, I have to say, I do not understand why you said you where planning on never taking your "steppies" again but are already planning to take your own child. I think to purposely plan a trip to something the caliber of Disney would, how do I put it? Not nice. However, there will be times that you and DH and the two of you's child will do things without the other children, duh, you are noncustodial. IF you are leaving them out bc they are not "your" children, then that is wrong, but if you are doing just in the course of being a family, period. That is different.
You will find no matter what you do as a stepmom you are wrong, wrong, wrong and the schildren are everyone's business but not yours, but yet, they are your responsibility and you must bow down and grovel.
I love my bonus kids dearly, but what other people put you through is hell.