To: Aishes Chayil
Licht is not a problem. I believe most poskim hold that in such a case you can use electric “licht”.
As far as hot food for Shabbas, what I have done is bring a small electric plata (hot plate), turn it ON before Shabbas, and set in on a timer to go OFF after the Shabbas lunch food has been warmed. I believe it is assur to set it to go ON on Shabbas morning.
I also do NOT let the hotel chambermaid in the room on Shabbas.