So sorry to hear about the problems on your trip! We've taken trips with friends or family almost every time we go. After the trip with family, we decided that would never happen again!! As far as friends, we have one family that we travel great with - we enjoy the same things and our children know better than to think about not being nice to each other. They are great friends and love each other like sisters. We are actually taking our third trip to DW with them in October. Other times, we haven't exactly traveled with friends but have know when friends would be there and would make it a point to catch up with them - whether or not it lasted the whole day or more than one just depended on their interests. We are honest and let everyone know ahead of time what's on our agenda. Plus we have been going to DW quite often over the last 8 years so we are more likely to give up some of the smaller things to help our friends have a good time but we certainly don't put all their wants ahead of ours!
Hope your trip next year goes much better!!
Hope your trip next year goes much better!!