Maybe get a beater resto-project as well.
Worked well for me in rough areas so far.
Also, go ahead and scrape the logos off your Surly if you're worried about theft. The head-badge too. You could get a hand made head-badge to replace it.
And always, carry a big lock. Something with a small-shackle as long-shackle gives more pry-bar room for thieves. I lock all my bikes (beater or not) with two locks. Yup. Over cautious, much? Maybe.
"Things look different from the seat of a bike carrying a sleeping bag with a cold beer tucked inside." ~Jim Malusa
2009 Trek 520-Brooks B-17 Special in Antique Brown
2010 Surly Long Haul Trucker-Brooks B-17 Standard in Black
1983 Fuji Espree Single Speed-Brooks B17 British Racing Green