First Timer in MA

Hi! I just moved from CA to MA, and there are two Wegmans that appear 'close' to me.. about equal distance apart. Northborough and Burlington. I've never stepped foot inside a Wegmans before, and would love to try it. I am GF, and heard they are great for those allergic to gluten.
Questions:

Does anyone live in MA and have an opinion on which of the two locations near me would be a better option?

Any tips for a first time Wegmans shopper, what to buy.. what to avoid.. how to get sales.. gluten free hidden gems?

Thanks all!