Replying to Dealing with knee injuries...?

So long story short I dislocated my right knee in 2007 and 2010 and did PT for awhile each time after.   Last skiing season I could tell it was weak. After a long day in the park it would begin to ache and also sometimes when I landed badly or took a crash I could feel it pop out slightly or to the point of it quickly dis and relocate. This would happen maybe 2-3 times a day.

This past school year I took a Strength and Conditioning class for a full year and really worked hard and made quite a bit of muscle. So my knee is stronger but I doubt it is 100%.

My question is should I get a thin brace to wear? Maybe like neoprene?       I have a super beefy knee brace that I got when it dislocated in 10' and you can only wear it for a little while, so this would not be an option while skiing.

What do you guys that have knee problems do to help out while your skiing.