I just tried lon's recipe for xmodmap modifiers on both the stowaway and freedom mini keyboards. All is hunky-dory for typing on sites like this one. Thanks again lon for your good work!

A cheap Y usb cable together with a usb hub also allows a normal USB keyboard to be connected,
as detailed elsewhere on this site. Going mini, I decided to order the inexpensive and tiny "keysonic" nano usb keyboard:

https://linitx.com/product_info.php?products_id=838

However at the moment the stowaway Think Outside is my favourite.