Tips for Delphi with 2 kids under 5

We’ll be doing a day trip to Delphi from Athens. I’ve read to bring a carrier but that’s all I have for tips. I know it is a steep climb (we’ve done steep-ish climbs in Japan with our eldest). Any other suggestions? Should we drive or get a tour? Any tour suggestions? Can we bring a stroller on the tour bus but leave it as we climb Delphi? Any tips with kids would be much appreciated

I have a 16m and 5yo with me