I used my Force for a self-support trip but trust me, it was way overloaded. I only took it, versus a larger IK, because I usually could roll it. But no way when it was stacked with gear.
I terms of your question my bet, and it's only a bet, is that it will suffer in all respects. Though the general view, especially of folks who don't paddle an IK, is that they are easier than a hard shell, I personally don't think this is true in harder water when you are making high speed ferries and such. You have much less control with just thigh straps and if the upstream edge gets caught it's hard to correct. If your IK is overloaded I think edge control (as if an IK really has an edge) and spinning will be harder. But it's a sporty boat and lots of fun so you may be fine but ideally I think the larger boat would be better for you.