Medical Travel Deduction for multiple days

Had to go to the hospital over several days for various tests and doctor meetings.  

What can be deducted in the following scenario?

Scenario: 

Day One: Travel from Home to Hospital (200 miles one way) for consultation with Doctor and then traveled to a family member's house (50 miles) to stay overnight.

Day Two:  From the family member's house went back to the hospital to get treatment (50 miles).  Traveled back to family member's house to stay overnight (50 miles).

Day Three:  Again, had to go from Family Member's house back for another treatment (50 miles). And then traveled back to family member's house to stay overnight (50 miles).

Day Four:  From Family member's house to back Home (220 miles).

Questions:

Mileage:  What mileage can be used for deductions?

Lodging:  We would stay at a hotel if we didn't have a family member willing to give us lodging, can staying at the family member's house be the same as amount ($100/night for 2 people) as a hotel?  Or do we need hotel receipts?

 

Thanks for your feedback.