I think you are pretty safe using the name. Since the registered U.S. trademarks are now expired or abandoned, the name "Creative Weddings" is available to be trademarked by someone else. In addition, the trademarks that were registered were design marks, so just the words themselves would be available.
With respect to the Florida company, I did not see any trademark registered by them for "Creative Weddings." This may be because they are just a local Florida business. Which brings me to the other part of your question - is trademarking necessary? Trademarking is not really necessary unless you intend to use the name in interstate commerce (i.e. if you do wedding planning outside of California). If you just plan on doing wedding planning inside of California, then you could just register your trademark with the California Secretary of State's Office
, and this would prevent someone else in California from using the name "Creative Weddings." You can find the California Trademark Registration Form Here
Of course if you ever plan on doing business in other states, then it would make sense to register a federal trademark with the U.S. Patent
& Trademark Office.
In addition, the Florida business indeed does not seem to be directly involved in the planning business but rather in the business of invitations, etc. So, there would be little chance of consumer confusion.
If the Colorado planning business ever complains about you using the name, you could respond by saying their trademark expired or was abandoned, and that they are also a local business.
So, again I think you are pretty safe.