I would set boundaries and schedule times to spend with each set of in-laws to balance between parents and in-laws. Parents and in-laws will be treated equally the same. There shouldn't be any favoritism the love and help will be evenly distributed. Both are welcome to visit with preparations made in advance. How would you balance between parents and in-laws?

I agree entirely on the issue of boundaries and timetable with each set of parents. This is done to make sure there is no favoritism. By being open with both sets of parents, you will create an atmosphere where all felt loved and respected.

Set visit times for each time you will visit them for a weekend. Then set time that the in-laws will visit you separately and have them their at the same time for a weekend for the in-laws. Always treat them equally with your time.