Firm/Insurance Q's Watch

ok long story short the four uni's i have applied to are Glasgow Strathclyde Dundee and Stirling. I have recieved offers from strathclyde and dundee and i am waiting on the other 2. I live in glasgow, so if i were to go to Glasgow or Strathclyde i would stay at home, however if i went to Stirling or Dundee, i would need accomodation.

Glasgow/Strathclydes offers will be higher than the other 2, thus i would make one of them my firm, and one of Dundee/Stirling as my Insurance.

However, if i do put one of the "away" uni's as my insurance and end up not making the Firms grades, will i still be able to get accomodation?

thanks, sorry for going on a bit