Storing propane and hydrogen are two very different things. Propane is easy to maintain as a liquid at relatively high pressures, not so hydrogen. If fact hydrogen is very difficult to hold as a gas because of its low molecular weight.
Hydrogen has the added danger of producing an invisible flame, not so propane.
Storing propane as a low-pressure gas is no more difficult than propane (and, in fact, old propane tanks work just fine with hydrogen). Yes, hydrogen's flame is invisible..a disadvantage. But, hydrogen is very much lighter than air, so tends to disperse much more rapidly than propane (or gasoline fumes). But the technology exists for safe use of either. There is nothing "exotic" about hydrogen storage. Millions of pounds of hydrogen are stored and used in myriad different size scales on a daily basis, from lecture bottle size tanks up to tank-truck size tank assemblies, in hundreds (if not thousands) of locations around the US.