Im doing something similar - so far Im using Crusaders Scots, GB picts, some Scheltrum caterans as galwegians and a half dozen normans. Probably add in some saxon types as troops from the lothians too.
Depending on the size of your warband I reckon you can do a fair bit of mixing & matching. Pictish styles wont have died out by the 11thc and youve got saxons, scots, vikings, normans and welsh as well.
Id go for a majority of troops in bare legs and a smattering of other styles unless youre going big enough to group them into contingents.