Yeah, that's no problem. All you have to do is walk the last 100km. This is then stamped in your pilgrim passport. These stamps can be found in hostels, but there are also stamps in many other places.

Partly also in the hotels, but mainly in bars and souvenir shops. In almost every church.

And in Fao even in a former telephone booth.

Stempel in Telefonzelle in Fao
Stempel in Telefonzelle in Fao

So it is also no problem for hotel pilgrims to collect enough stamps.