After installing ToB Should I do Watcher's Keep before going on to Ch7 of SoA? And after completeing SoA Do i get to keep any or all of my party? If only my main character can be brought in what do I do Put all kick -ass equiptment in the BAG of Hollding or something before the end of Ch 7? I need some advice
Thanks!

Right first off, I think you can bring in the whole party, and also, don't worry, you can do watchers keep whenever, if you think you have enough experience go in SoA, but if you want to ait you can do it in ToB.

Don't worry about losing anything that your party has. You can continue with everything in ToB. Watcher's Keep is more enjoyable if you do it while still in SoA. Once you get to ToB, your party is too powerful. (In my opinion.) If you want a challenge, do it in Chapter 2 or 3 of SoA.

Make sure you have in your party's inventory whatever items you want to bring over to ToB. Once you finish SoA, ToB will start and you cannot return to the SoA areas, except for WK.