Using Min & Max date from dataset in report heading

I'd like to create a header for my report showing the date range of the data that is presented.

As I have a datestamp in my dataset for each record, I'm hoping to avoid hard coding the date range in my report, and instead finding some means to show the smallest/minimum date and the largest/maximum date, in order to show the period of the data.

I've tried playing text boxes and the like, but have not been able to apply a minimu or maximum selection to these.

My last resort is to try and create a reference query from my original dataset to include 1 record of 2 columns, with a "start" and "end" date. I'm not entirely excited about this as it does then prevent me in future from incuding a date filter on my report, and then having the report header dynamically update as well.

Any thoughts on how I could approach this?