i am sure it will be fine once they get there and you will enjoy their stay and they will love the house and think everything looks fantastic, but i am just like you and i don't like surprise guests, i don't like changes of plan and i always get worked up over houseguests, but in the end it is just me being nutty for no reason. you will have fun, and tomorrow you can shop and plan. family should be easy enough to please, shouldn't they?
I don't like surprise guests or changes of plan, either, and I always fret over company, too. We've always had a great time with hubby's sister and her hubby, but I'm now I'm fretting because they are city people, and have not visited us since we moved to a rural area-we lived in the 'burbs before then and there were restaurants, shopping centers and all that within a mile or two-I'm a bit afraid they may be bored.