I (17/f) don’t know how to hang out with my girlfriend (16/f) this summer because of her homophobic parents

Hey Reddit. I wanna start off by saying I’m a 17 year old bisexual F and I have a girlfriend who is 16 year old F and a lesbian. We’ve been dating for 10 months and last summer something happened and we weren’t able to see or talk to each other for the whole three month vacation. Long story short her parents are homophobic and found out we were together. Took away her phone, laptop, school Chromebook and anything she could use to talk to me. Anyways we’re still together despite what her parents know and we’re doing amazing. The only thing is, her parents are strict and don’t let her hang out with friends like ever. When we’ve been hanging out she uses theater rehearsals or choir events as an excuse to come to my house or go out somewhere with me and it works like a charm. Summer is rapidly approaching and I’m not sure what to do. I don’t know what type of excuse she could use to hang out with me over the summer since school will be over and with that, so will theater. I think we’ll have workshops do maybe those can be valid excuses but im not sure what else she could tell her parents. we have a whole list of summer plans and i really wanna be able to see her. please help me out.