When flaps are dropped, they always increase drag, and most always increase lift.

However, in doing so, the airplane may pitch nose up or nose down. Note that a nose-down pitch does NOT mean a reduction in lift. So be sure to try your flaps up high first and be ready for a pitch change. In general, short coupled planes tend to pitch down with flaps, planes with longer tails will pitch up. But it's not easily predictable as there are several factors at work such as the CG as mentioned above.

Raising the ailerons as "spoilerons" can help you drop in for a landing on a short field by killing lift, and can be useful, but isn't seen much on powered planes. If your plane is a real "floater" that never wants to land, spoilerons can help. Other than that, though, I wouldn't bother with them.