It is aluminum
Finding sites is tough, especially on the east coast. East coast a toad/4-down would be much easier.
The further west you go, the easier it gets to find campgrounds with the extra long sites or extra parking for trailers.
Another consideration - A trailer also takes longer to load up than a toad.
Trailer is also more weight - both on the tongue of the rig and also pulling uphill.
Our rig has a 30,000# towing capacity and can handle 5,000# on the tongue. According to scales, trailer fully loaded, we are just under 10,000# for the trailer (including the tongue weight) and under 2,000 on the tongue.
when looking a A-Class rigs you will need to be careful to check your towing weight limits as many of them have limits around 10,000# total.