Oracle 10 to 11: charset issue

Question

I was redirected from SE's root site to this one.

I'm not a DBA, so I shouldn't be doing this, but I have to, so I apologize beforehand to all of you DBAs that will read this post:

I'm migrating an Oracle database from 10.2.0.4.0 to 11.2.0.1.0 from win 2003 to win 2008 both 64-bit.

I planned, for starters, to export/import and see what happened, and I found that while most of it went well, I had an issue with different charsets: On 10 I have WE8MSWIN1252 and on the new 11 it's using AL32UTF8.

I get "value is too long" for a few records on a few tables. Everything else seems to be in reasonably good shape.

I read somewhere that the length issue is related to a few mono-byte characters getting translated to multi-byte hence I need to increase the size of my columns with problems.

http://docs.oracle.com/cd/B28359_01/server.111/b28298/ch11charsetmig.htm#g1011430

I'll be doing just that: 1) Letting the import/export service do the charset translation. 2) I'll run an import for the metadata only, 3) then alter the tables with the issues, 4) and afterwards import the data.

I'll be using the EM console to do that because, well, my PL/SQL skills suck. :)

Anything extremely wrong with that approach? Any tips/advice you might think of?

Thanks in advance.