I am basically on the same cruise you are RK, except I'm using 200mg/wk of test c instead of 300 but the HCG and 0.5mg EOD of AI are the same.
HCG is a "cosmetic" addition so stopping for a while is fine if you don't mind the testes shrinking up on ya. I'd like to add also that your cruise is essentially a TRT program. Low doses of test and HCG is the most common HRT/TRT out there. So consider yourself already on one.
In fact, if you drop down to 200mg a week and cut out the HCG, you may not even need the AI but you should confirm that with bloodwork periodically. If you do decide to stop using test altogether, I would say yes, you should employ a PCT protocol because even that low dose of test will shut you down.