Yes, they will still be there. The tent interior is always the same cell, so it will behave like any other player-owned cell in terms of respawning and such.
Of course, my experience has always been that when any cell resets, anything I placed in there is subject to disappearing - not stuff in containers, just things placed on tables or in weapons racks, etc. I use shadeMe's SPAWN mod to give player-owned cells a respawn time of 9999 hours for this reason (hence why the tent's wastebasket now force-empties daily, if you were curious).