I agree with your thought that they will keep them as smaller highly accretive production and reserve tuck ins.
They cannot be taking on more operational and balance risk buy acquiring a big fish while GSA development is underway. Would not be prudent at all. GSA is the big fish at 16000 boepd.
Based on Brent staying in the $110 range, they will likely not have to use any of the $250 million portion of their $430 million facility for GSA as their cash on hand, free cashflow over the next 18 months and the $180 million should easliy fund their portion of GSA development.
You can be almost sure (unless something unexpected develops) that they will do a minimum of three tuck ins between now and Stella. They just need to meet the purchase criteria....likely one of them being not too complex to integrate.