Sure, check out "rat park". A lot of studies by Bruce Alexander back in the 70s and 80s.

So proud of our new work comparing opioid self-administration between old (24 mo!) and young mice. We found that the old mice learned self-administration faster and took more remifentanil than the young mice. Great job team!
@mikebeckstead.bsky.social
@laciiiiiiiiiiii.bsky.social
bit.ly/3G7lJE7

Ask around you. People understand and will try to provide ice if they can. Hotels, restaurants, they all helped me in times of need.