I bought a 2008 Surveyor and had water in the cargo hold that seeped into front bedroom carpeting. The fix was replacing worn out door seals, but I agree with others moving water away from the TT sides via longer rain spots, purchased or Gerry Rigged clothes pins. whatever works for your budget.
2008 Modified Surveyor 303
2010 Dodge Ram Laramie 4x4
2013 From FL to Pick up Surveyor Islip,LI, PA,NY,VT,NH,MA,CT,NY and Home
2014 Sebastian Charleston,SC to Finger Lakes, Lake Erie, Lake Cowanesque,PA and home
2015 Sebastian to PA,NY,WI,MN,return to NY and home
2016 GA,SC,NC,TN,KY,OH,PA,NY,to Sebastian,FL