Last year we stayed at this location
Happy Trails
This was a great B&B just 7 mile north of Fredericksburg. It allowed us to cover the entire area from early in the day to late evening coming and going. We stayed three nights, only for two adults. I had an old book giving routes off the beaten path. For going off the main roads need a truck because you will cross several river bottoms...it was great. Just some great sights you would never see otherwise. We planned which direction we wanted to go and what to cover each day.
We left one day early and spent the night in Schulenburg. Got up real early and went to several "painted churches" in the surrounding area. Did this fast with a plan and by early afternoon we were on our way to the hill country. Took loads of pictures. Plan to do this during the week...less people.
As for time..... we went the last week in April. That my be border line late but it was still good. Maybe mid April just depends. Hope all this helps. We held to our plan 90% of the time. Be sure to at least do the Willow City Loop if that is the area to travel. We did it late evening.
I use this book and google to plan.....
WildflowerHaven Community Store Good Luck.