I have found that most in GC's are amazingly friendly.
I would close blinds and leave either radio or tv on. first trip out I wouldn't be gone long, 20-30mins come back and ask you neighbor if the dogs were barking.
I've done this and the dogs haven't been a problem. I've also done when we've had a football game on the radio/tv on outside. we can get a little wound up watching our Sooners! I've checked with neighbors to make sure volume isn't too high.
the only other thing I would suggest is purchasing a sign of some sort that alerts people that you have pets inside in case of emergency.
we found ours at camping world. just a little yellow sign with a suction cup that we just stick to the window when we leave with "in case of emergency please rescue ......" we added a '3' and an 's' so if, God forbid, something should happen hopefully someone would try and save 'the girls.'
just remembered that we put 'the girls' in the trailer while parked at home several times and tried to get them somewhat accustomed to being in it without us. i'll admit that they did some barking at first but as I said since then every time I've checked with the neighbors they have said no barking that they heard.
please don't get discouraged with the forum with some of the responses that you've received and will receive. I've found that some are going to have a negative response to any question that you can come up with.
happy travels!