I just started using mods and luckily I had a backup of my game. Do not install the Equipment with Quick Slots Mod. If you die with a full inventory and go back to get your stuff all the gear in the quick slot & equipment slots is lost. I'm only using Valheim + and unrestricted portals although I think there's a setting in V+ to allow unrestricted portal access for ores.
My save was a couple days old but at least I got all my stuff back after losing it.

Just backup everything before you start.