simple question on branching

We don't often use branching and/or merging based on the simple nature of our version releases with very little overlap.  We have a longer ranging version - the next 7 months or so in progress.   Since we are getting ready to deliver some file changes I'd like to use the trunk instead of a branch just because it's easier.
 
There is a very little chance we would really need to release anything to the previous production level during these 7 months. If it came up I was going to just copy the tag to a branch and use that for development - and basically tagging it (or maybe even merging into the tag).
 
Any reason that creating a permanent branch on the tree would matter -- i mean never merging it anywhere?   I don't see what harm it would have really - but I just wanted to be sure in case I decide to branch from the production  version of the trunk instead.  
 
Probably a silly question - but it's good to have input from others who branch and merge regularly. 
Thx for any help.   If it matters - we are still on svn 1.4.3.
KM
 
Received on 2010-11-03 14:45:25 CET