One strategy I've thought about:

• Run a Virtual Machine with some version of Linux.
• Install tor and/or tor browser on it.
• Set up and run a vpn on it.
• Install a couple of wallets that support Liquid and tor. Run them over tor.
• Use Boltz exchange or SideSwap (peg-in / peg-out tool), to get Liquid-BTC into one of the Liquid wallets.
• Use Boltz or SideSwap to get funds into a Lightning wallet. -
  Send to another Lightning.
• Use Boltz to get the lightning funds back into BTC.
• Send to your Hodl wallet / cold storage.

For the lightning part, perhaps have a pair of Lightning nodes and send the funds between them. Both running over tor and/or vpn. Mobile lightning probably works, too, but I don't totally trust smartphones.

There are several variations possible, and maybe over-kill, but I like peace of mind.