From snapshot to stable 21.02 - Setting and optional packages

Hi,

for Linksys MR8300 I'm going to go from snapshot to stable release now available. I would to do a backup for all setting and all optional packages used on snapshot to recover on a stable firmware .
Both of them are 21.02. Can I do it whiteout problems ? How?

Thank you

The configs for 21.02 are as far as I know the same after the release of rc2.

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My snapshot is:

OpenWrt 21.02-SNAPSHOT r15894-69b77dc3b4 / LuCI openwrt-21.02 branch git-21.073.45508-556353f

I think before RC2. So i can't.Right?