Hey Voddy107
Please do not stress about dress code for yourself or for the kids. I brought loads of cover up clothes and I actually found it made me stand out as everyone else was dressed like tourists
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!! The most part of Tunisian women wore western style clothes (in PEK, Monastir and Sousse, Kairouan, Sahara trip). I only saw few women completely covered in the veil and they tended to be the older generaton. As Anna said you may be surprised!!! Normal tourist gear is fine but obviously bikinis, bellytops and hotpants in public are a no no but you wouldn t do that at home anyway!!!
Kids can dress as they would at home by the seaside shorts T shirts, cool comfortable clothing .Obviously not provocatively (eg 10 year old girls in really short miniskirts, hot pants and belly tops, dressing like 20 year olds) but again most people wouldn t allow their child to do that at home either.
With regards to trousers some hotels
do insist on men wearing long trousers to dinner. Maybe in family orientated hotels its different but in the Kanta, 1 man was made go up and change. but kanta is more of a couples hotel and is quite serious about dress code ( but we knew that before we went so it was no problem).
the main thing is to feel comfortable outside as it can be very hot.
Good luck