Will this work?

I have been running 2.8.2+ but due to an apparently serious mistake on my part I have lost access to my server via http.  I still have access via SSH and FTP and have managed to back up my entire database, my moodledata directory, plus everything else I can think of that can't be replaced.

My question is: Can I rebuild my server, upload my old database, upload my old moodledata, then reinstall moodle and have everything work?

2.8.2 doesn't seem to be available anymore so I will likely have to use 2.8.6.  Will this be a problem?  What about moving directly to 2.9?

Thanks for any insights.