If it's deep enough, the bike isn't going anywhere even if you pick it up.
I have seen at least one inmate that carried a ground anchor and a come along when he rode in questionable places. There is that small electric winch you could mount as well. Biggest issue is finding things to attach it to.
Obviously my asshole level suggestion is to use a lighter bike for riding like that. It's probably one reason nobody is doing the TAT on an 1150.