Hi Colette, you've got lots of good advice here. Here are a couple of other suggestions that might be helpful.
Firstly, when you're booking accommodation in Hondarribia, make sure you check its precise location on something like Google maps. Some of the private options are quite far from the Camino. And if you're thinking of staying in Hondarribia itself, the old town is lovely. I stayed in the Hotel Palacate (the time I met
@peregrina2000) and it was a really cute little place. If you prefer something more luxurious, the nearby Parador looks very nice!
When I first walked this part of the Norte, I walked from Hendaye and Irún to the
Capitan Tximita albergue on the day I arrived in Spain. That suited my timings and shaved a few kms off the first day's walk. There are also some private accommodations in the the same area as the albergue.
I also noticed that some pilgrims took a taxi from either Irún on Hondarribia to the Santuario de Guadelupe, which is a nice place to begin a Camino. That shortens the first day by 5kms and cuts out a lot of road walking.
And just to confuse you even further .... when I walked this route last September with my husband, we didn't stay in either Irún or Hondarribia - we spent two nights in San Sebastian. For that first day of walking, we took the 6.30am airport bus to Amute, which is just outside Irún , and the last stop before San Sebastian airport. The bus took just 25 mins and we basically just sauntered back to San Sebastian, stopping for a long lunch in Pasaia. As we'd left much of our gear in the hotel, our packs were nice and light. That might be an awkward arrangement for you, but it worked really well for us.
Happy planning and Buen Camino!