I'm not sure too much traveleing in SLCs has taken place yet, just because they are fairly new.
I know a number of folks here have made trips in GT40s, similar in size and lack of storage.
I know of one several thousand mile trip in a 40 with wife and dog, so I'm sure it can be done.
Mesa, a regular poster here has moved his SLC radiators to the side and added a front trunk (check his build log).
I personally think a road trip in my 40 would be great! But, alas, I'm not too sure my lovely bride would find it as fun as I