Bearings and seals for 1957 Bubble

Headed out of state this weekend to rescue a 1957 Bubble that's been sitting dormant for many, many years. Will be putting new wheels and tires on her, and would also like to do the bearings and seals, but I can't find any definitive info on what size/type bearings and seals to buy. It will be a Sunday, in the middle of nowhere in TN, so I can't count on having a shop nearby to buy parts from on the fly. Whatever I buy ahead of time and take with me is all I'm going to have. Any idea how I can find out what size bearings and seals to buy? I'm happy to buy several sets in different sizes just to make sure I'm covered, but I don't even know what range I should be in. Looks like there are several good sources for the kits online...



Bearing Kit Trailer Bearings and Races | etrailer.com



Trailer Wheel Bearings & Races at Trailer Parts Superstore



trailer bearing kits for boat, utility, rv, car and motorcylcle trailers



Thanks in advance!!