I am a regular hill walker. If out in the countryside we go behind handy bushes or trees to pee. If you are walking direct from your hotel/cottage, you could set out with them, then turn round and walk back at your own pace. If you use cars perhaps you could drive back when you’ve had enough.
Good footwear essential for any distance - ask at an outdoor shop for something appropriate. Doesn’t have to be full boots. Get in some walking each day & build up the distance gradually if you have time.
When on the holiday could you visit historic sites? Go shopping? Take books, art/craft items eg sewing, sketch book etc. to amuse you.
On the walk make sure you have a bottle of water and lunch/snacks. Nuts are good. Good breakfast too.
Better to explain & perhaps be a little embarrassed rather than walk too far & feel unable to go on. Enjoy your trip.
if your recycling or rubbish collections days are Monday,Tuesday,Wednesday


