Need suggestions on doing resin outdoor

Hello, I want to try doing resin outdoor because I'm afraid of causing my housemates health issues. I'm thinking of going to nearby garden and bring back my resin in a closed box. The problem is:

1. How do i use heatgun with no electric plug near me? Is there a good battery powered heatgun out there?
2. How do I carry the resin back home in flat position? The garden is just different floor of the apartment so its not far but I don't think my hand will steady enough that the resin will always be flat

Thank you