We've just booked tickets for a mid-May visit to Iceland. We have 5 full days so we want to visit the Golden Circle and the sites of the South Island. We've looked at booking a self-drive tour with a company that gives you a trip planner and books accommodations, but we prefer to be more adventurous and plan our own trips. So, we have a few questions:

• Is it pretty easy to figure out your way around and find the sites we want to see, i.e. is signage pretty clear along the road?
• It is necessary to book glacier hikes and whale watching tours ahead of time or is it possible to book upon arrival?
• It is possible to wing it while we're there, or is it becoming such a popular destination that we should book everything ahead of time?
• Are Airbnbs a good alternative to hotels? Thanks!

We've just booked tickets for a mid-May visit to Iceland. We have 5 full days so we want to visit the Golden Circle and the sites of the South Island. We've looked at booking a self-drive tour with a company that gives you a trip planner and books accommodations, but we prefer to be more adventurous and plan our own trips. So, we have a few questions:

• Is it pretty easy to figure out your way around and find the sites we want to see, i.e. is signage pretty clear along the road?
• It is necessary to book glacier hikes and whale watching tours ahead of time or is it possible to book upon arrival?
• It is possible to wing it while we're there, or is it becoming such a popular destination that we should book everything ahead of time?
• Are Airbnbs a good alternative to hotels?