Hello,
Having read many of the posts on this forum looking for advice about footwear, travelling with poles, which rucksack is the best, poncho or rain jacket etc etc etc.....everyone has there own preferences and different experiences. I have now been on 4 different Caminos, the first one we bought out poles in SJPdP, I was reluctant to throw mine away and as I had a trapped nerve in my behind I decided to walk to the plane with them, I was asked if I needed them to walk to which I replied yes and I was allowed to take them on board the plane. The 2nd time we checked one bag with all the poles and toiletries etc. Last time we took the risk of travelling with our poles (with rubber tips on) in our packs which we took as carryons and there was no problem That was flying from Scotland and back from Spain. As far as blades are concerned your knive is too long, 2 inches is the max length for carry on, my son kept on buying penknives when we were in Spain and had to leave them in the airport as the blades where too long. Bon Camino