Ohhhh good for you!!! It's amazing how hard it can be to do things for ourselves guilt free. I made a nice dinner and a chocolate cake for my guys (dh 32yo, ds1 4yo, and ds2 1yo) so I wouldn't feel guilty going to the guild meeting wed night.
Have fun on your trip! Only the mama of a little one will understand the excitement of a bus trip. Quiet time. Alone. With no responsibility other than sitting. Do you knit or crochet? That makes it even better if you do!