You can't duplicate any date over two different regional boards. For example, you can't put May 5 on Boston and Chicago, in the case that you're traveling from one city to another on the same day. I got an ad removed for that one time.
How far in advance may a Visiting Ad be posted?
Also, do I need specific dates say, June 5th & 6th, or may I write, "the weekend of June 5th, exact dates yet to be determined"?
Is there any limit to how many regions I may post ads in at any given time? Say, for instance, I'm going to be in my home area on Mon & Tues, then in DC Wednesday & Thursday, Boston Friday & Saturday.... may I have ads posted in all 3 regions during that same 7-day period?
Thanks in advance for any info & guidance! 
Hugs & Kisses,
Debbie
-- Modified on 5/12/2015 1:37:22 PM
...anywhere from 6 weeks to 2 weeks.
As long as you have the dates in the subject line your Chicago, DC, Boston example above would be fine.
You can't duplicate any date over two different regional boards. For example, you can't put May 5 on Boston and Chicago, in the case that you're traveling from one city to another on the same day. I got an ad removed for that one time.
you must have the dates you will be in those cities in the headline for the ads.
LLAP,
Swim